ADuC816 0

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a
MicroConverter
®
, Dual-Channel
16-Bit ADCs with Embedded Flash MCU
ADuC816
FEATURES
High-Resolution Sigma-Delta ADCs
Dual 16-Bit Independent ADCs
Programmable Gain Front End
16-Bit No Missing Codes, Primary ADC
13-Bit p-p Resolution @ 20 Hz, 20 mV Range
16-Bit p-p Resolution @ 20 Hz, 2.56 V Range
Memory
8 Kbytes On-Chip Flash/EE Program Memory
640 Bytes On-Chip Flash/EE Data Memory
Flash/EE, 100 Year Retention, 100 Kcycles Endurance
256 Bytes On-Chip Data RAM
8051-Based Core
8051-Compatible Instruction Set (12.58 MHz Max)
32 kHz External Crystal, On-Chip Programmable PLL
Three 16-Bit Timer/Counters
26 Programmable I/O Lines
11 Interrupt Sources, Two Priority Levels
Power
Specified for 3 V and 5 V Operation
Normal: 3 mA @ 3 V (Core CLK = 1.5 MHz)
Power-Down: 20
FUNCTIONAL BLOCK DIAGRAM
AVDD
ADuC816
AVDD
AIN1
AIN2
MUX
BUF
PGA
PRIMARY
16-BIT
-
ADC
CURRENT
SOURCE
MUX
IEXC1
IEXC2
AIN3
AIN4
AIN5
AGND
MUX
AUXILIARY
16-BIT
-
ADC
12-BIT
VOLTAGE O/P
DAC
BUF
DAC
TEMP
SENSOR
8051-BASED MCU WITH ADDITIONAL
PERIPHERALS
8 KBYTES FLASH/EE PROGRAM MEMORY
640 BYTES FLASH/EE DATA MEMORY
256 BYTES USER RAM
INTERNAL
BANDGAP
VREF
PROG.
CLOCK
DIVIDER
16 BIT
TIMER/COUNTERS
1
3
ON-CHIP MONITORS
POWER SUPPLY
MONITOR
WATCHDOG TIMER
I
2
C-COMPATIBLE
UART AND SPI
SERIAL I/O
TIME INTERVAL
COUNTER
EXTERNAL
VREF
DETECT
OSC
&
PLL
4
PARALLEL
PORTS
REFIN–
REFIN+
XTAL1
XTAL2
A (32 kHz Crystal Running)
intended for the measurement of wide dynamic range, low
frequency signals, such as those in weigh scale, strain gauge,
pressure transducer, or temperature measurement applications.
The ADC output data rates are programmable and the ADC
output resolution will vary with the programmed gain and
output rate.
The device operates from a 32 kHz crystal with an on-chip PLL
generating a high-frequency clock of 12.58 MHz. This clock is,
in turn, routed through a programmable clock divider from which
the MCU core clock operating frequency is generated. The
microcontroller core is an 8052 and therefore 8051-instruction-
set-compatible. The microcontroller core machine cycle consists
of 12 core clock periods of the selected core operating frequency.
8 Kbytes of nonvolatile Flash/EE program memory are provided
on-chip. 640 bytes of nonvolatile Flash/EE data memory and
256 bytes RAM are also integrated on-chip.
The ADuC816 also incorporates additional analog functionality
with a 12-bit DAC, current sources, power supply monitor,
and a bandgap reference. On-chip digital peripherals include a
watchdog timer, time interval counter, three timers/counters,
and three serial I/O ports (SPI, UART, and I
2
C-compatible).
On-chip factory firmware supports in-circuit serial download and
debug modes (via UART), as well as single-pin emulation mode
via the
EA
pin. A functional block diagram of the ADuC816 is
shown above with a more detailed block diagram shown in
Figure 12.
The part operates from a single 3 V or 5 V supply. When operating
from 3 V supplies, the power dissipation for the part is below
10 mW. The ADuC816 is housed in a 52-lead MQFP package.
On-Chip Peripherals
On-Chip Temperature Sensor
12-Bit Voltage Output DAC
Dual Excitation Current Sources
Reference Detect Circuit
Time Interval Counter (TIC)
UART Serial I/O
I
2
C
®
-Compatible and SPI
®
Serial I/O
Watchdog Timer (WDT), Power Supply Monitor (PSM)
APPLICATIONS
Intelligent Sensors (IEEE1451.2-Compatible)
Weigh Scales
Portable Instrumentation
Pressure Transducers
4–20 mA Transmitters
GENERAL DESCRIPTION
The ADuC816 is a complete smart transducer front-end, inte-
grating two high-resolution sigma-delta ADCs, an 8-bit MCU,
and program/data Flash/EE Memory on a single chip. This low
power device accepts low-level signals directly from a transducer.
The two independent ADCs (Primary and Auxiliary) include a
temperature sensor and a PGA (allowing direct measurement of
low-level signals). The ADCs with on-chip digital filtering are
MicroConverter is a registered trademark of Analog Devices, Inc.
SPI is a registered trademark of Motorola, Inc.
I
2
C is a registered trademark of Philips Semiconductors, Inc.
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 World Wide Web Site:
Fax: 781/326-8703
© Analog Devices, Inc., 2001
 ADuC816
TABLE OF CONTENTS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
. . . . . . . . . . . . . . . . . . . . . 18
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
. . . . . . . . . . . . . . . . . . . . . . 19
. . . . . . . . . . . . . . . . . . . . . . . . . . 21
. . . . . . . . . . . . . . . . . . . . . . . . . . . 22
. . . . . . . . . . . . . . . . . . 23
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
. . . . . . . . . . . . . . . . . . . . . 24
SFR INTERFACE TO THE PRIMARY AND
. . . . . . . . . . . . . 25
. . . . . . . . . . . . . . . . . . . . . . 25
. . . . . . . . . . . . . . . . . . . . . 26
. . . . . . . . . . . . . . 27
. . . . . . . . . . 29
Registers) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
ADC1H/ADC1L (Auxiliary ADC Conversion Result
. . . . . . 29
OF0H/OF0M (Primary ADC Offset Calibration
. . . . . 30
OF1H/OF1L (Auxiliary ADC Offset Calibration
30
GN0H/GN0M (Primary ADC Gain Calibration
Registers) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
GN1H/GN1L (Auxiliary ADC Gain Calibration
Registers) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
PRIMARY AND AUXILIARY ADC CIRCUIT
31
Primary ADC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
PRIMARY AND AUXILIARY ADC NOISE
. 33
Analog Input Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Primary and Auxiliary ADC Inputs . . . . . . . . . . . . . . . . . . . . . . 33
Analog Input Ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Programmable Gain Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . 34
. . 34
Burnout Currents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Excitation Currents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Reference Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Reference Detect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
. 35
Digital Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
ADC Chopping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
. . 36
. . . . . . . . . 37
Flash/EE Memory Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Flash/EE Memory and the ADuC816 . . . . . . . . . . . . . . . . . . . . 37
ADuC816 Flash/EE Memory Reliability . . . . . . . . . . . . . . . . . . 37
. . 38
Flash/EE Program Memory Security . . . . . . . . . . . . . . . . . . . . . 38
Using the Flash/EE Data Memory . . . . . . . . . . . . . . . . . . . . . . . 39
. 39
. . . . . . . . . . . . . . 40
. . . . . . . . . . . . . . . . . 40
Erase-All . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Program a Byte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
USER INTERFACE TO OTHER ON-CHIP ADuC816
. . . . 41
DAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
. . . . . . . . . . . . . . . . . . . . . . . . . . 43
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
SERIAL PERIPHERAL INTERFACE . . . . . . . . . . . . . . . . . . . . . 48
48
MOSI (Master Out, Slave In Pin), Pin 27 . . . . . . . . . . . . . . . . . 48
SCLOCK (Serial Clock I/O Pin), Pin 26 . . . . . . . . . . . . . . . . . . 48
SS
(Slave Select Input Pin), Pin 13 . . . . . . . . . . . . . . . . . . . . . . 48
Using the SPI Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
. . . . . . . . . . . . . . . . . . . . . . . 49
SPI Interface—Slave Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
. . . . . . . . . . . . . . . . . . . . . . . . 50
. . . . . . . . . . . 51
Parallel I/O Ports 0–3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Timers/Counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
. . . . . . 54
Mode 0 (13-Bit Timer/Counter) . . . . . . . . . . . . . . . . . . . . . . . . 54
Mode 1 (16-Bit Timer/Counter) . . . . . . . . . . . . . . . . . . . . . . . . 54
Mode 2 (8-Bit Timer/Counter with Autoreload) . . . . . . . . . . . . 54
Mode 3 (Two 8-Bit Timer/Counters) . . . . . . . . . . . . . . . . . . . . 54
. . . . . . . . . . . . . . 55
TH2 and TL2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
RCAP2H and RCAP2L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Timer/Counter 2 Operating Modes . . . . . . . . . . . . . . . . . . . . . . 56
. . . . . . . . . . . . . . . . . 56
16-Bit Capture Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
. . . . . . . . . . . . . . . . . . . . . . . 57
SBUF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
. . . . . . . . . . . . 58
Mode 1: 8-Bit UART, Variable Baud Rate . . . . . . . . . . . . . . . . 58
Mode 2: 9-Bit UART with Fixed Baud Rate . . . . . . . . . . . . . . . 58
Mode 3: 9-Bit UART with Variable Baud Rate . . . . . . . . . . . . . 58
UART Serial Port Baud Rate Generation . . . . . . . . . . . . . . . . . 58
Timer 1 Generated Baud Rates . . . . . . . . . . . . . . . . . . . . . . . . . 59
. . . . . . . . . . . . . . . . . . . . . 59
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
ADuC816 HARDWARE DESIGN CONSIDERATIONS . . . . . . 62
. . . . . 62
External Memory Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
. . . . . . . . . . . . . . . . . . . . . . . . . . 63
Power Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
. . . . . 64
Power-Saving Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Grounding and Board Layout Recommendations . . . . . . . . . . . 64
ADuC816 System Self-Identification . . . . . . . . . . . . . . . . . . . . . 65
. . . . . 65
In-Circuit Serial Download Access . . . . . . . . . . . . . . . . . . . . . . 65
Embedded Serial Port Debugger . . . . . . . . . . . . . . . . . . . . . . . . 65
Single-Pin Emulation Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
. . . . . . . . . . . . . 66
Typical System Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . 66
QUICKSTART DEVELOPMENT SYSTEM . . . . . . . . . . . . . . . 67
. . . . . . . . . . . 67
DeBug—In-Circuit Debugger . . . . . . . . . . . . . . . . . . . . . . . . . . 67
ADSIM—Windows Simulator . . . . . . . . . . . . . . . . . . . . . . . . . . 67
. . . . . . . . . . . . . . . . . . . . 68
–2–
REV. 0
SPECIFICATIONS
1
ADuC816
(AV
DD
= 2.7 V to 3.6 V or 4.75 V to 5.25 V, DV
DD
= 2.7 V to 3.6 V or 4.75 V to 5.25 V,
REFIN(+) = 2.5 V; REFIN(–) = AGND; AGND = DGND = 0 V; XTAL1/XTAL2 = 32.768 kHz Crystal; all specifications T
MIN
to T
MAX
unless otherwise noted.)
Parameter
ADuC816BS
Unit
Test Conditions/Comments
ADC SPECIFICATIONS
Conversion Rate
5.4
Hz min
On Both Channels
105
Hz max
Programmable in 0.732 ms Increments
Primary ADC
No Missing Codes
2
16
Bits min
20 Hz Update Rate
Resolution
13
Bits p-p typ
Range = ± 20 mV, 20 Hz Update Rate
16
Bits p-p typ
2.56 V, 20 Hz Update Rate
p-p Resolution at this Range/Update Rate
Setting Is Limited Only by the Number of
Bits Available from ADC
±
Output Noise
See Table IX and X
Output Noise Varies with Selected
in ADC Description
Update Rate and Gain Range
Integral Nonlinearity
±
1
LSB max
Offset Error
± 3
µV typ
Offset Error Drift
±
10
nV/
°
C typ
Full-Scale Error
3
± 10
µV typ
Range = ± 20 mV to ±640 mV
0.5
LSB typ
Range = ± 1.28 V to ± 2.56 V
Gain Error Drift
4
±
0.5
ppm/
°
C typ
ADC Range Matching
± 0.5
LSB typ
AIN = 18 mV
Power Supply Rejection (PSR)
95
dBs typ
AIN = 7.8 mV, Range =
±
20 mV
80
dBs typ
AIN = 1 V, Range = ± 2.56 V
Common-Mode DC Rejection
On AIN
95
dBs typ
At DC, AIN = 7.8 mV, Range =
±
20 mV
90
dBs typ
At DC, AIN = 1 V, Range = ±2.56 V
On REFIN
90
dBs typ
At DC, AIN = 1 V, Range =
±
2.56 V
Common-Mode 50 Hz/60 Hz Rejection
2
20 Hz Update Rate
On AIN
95
dBs typ
50 Hz/60 Hz ± 1 Hz, AIN = 7.8 mV,
Range =
±
20 mV
90
dBs typ
50 Hz/60 Hz ±1 Hz, AIN = 1 V,
Range =
±
2.56 V
On REFIN
90
dBs typ
50 Hz/60 Hz ±1 Hz, AIN = 1 V,
Range = ±2.56 V
Normal Mode 50 Hz/60 Hz Rejection
2
On AIN
60
dBs typ
50 Hz/60 Hz ± 1 Hz, 20 Hz Update Rate
On REFIN
60
dBs typ
50 Hz/60 Hz
±
1 Hz, 20 Hz Update Rate
Auxiliary ADC
No Missing Codes
2
16
Bits min
Resolution
16
Bits p-p typ
Range =
±
2.5 V, 20 Hz Update Rate
Output Noise
See Table XI
Output Noise Varies with Selected
in ADC Description
Update Rate
Integral Nonlinearity
± 1
LSB max
Offset Error
–2
LSB typ
Offset Error Drift
1
V/
°
C typ
Full-Scale Error
5
–2.5
LSB typ
Gain Error Drift
4
±
0.5
ppm/
°
C typ
Power Supply Rejection (PSR)
80
dBs typ
AIN = 1 V, 20 Hz Update Rate
Normal Mode 50 Hz/60 Hz Rejection
2
On AIN
60
dBs typ
50 Hz/60 Hz
±
1Hz
On REFIN
60
dBs typ
50 Hz/60 Hz ±1 Hz, 20 Hz Update Rate
DAC PERFORMANCE
DC Specifications
6
Resolution
12
Bits
Relative Accuracy
± 3
LSB typ
Differential Nonlinearity
–1
LSB max
Guaranteed 12-Bit Monotonic
Offset Error
± 50
mV max
Gain Error
7
±
1
% max
AV
DD
Range
± 1
% typ
V
REF
Range
AC Specifications
2, 6
Voltage Output Settling Time
15
s typ
Settling Time to 1 LSB of Final Value
Digital-to-Analog Glitch Energy
10
nVs typ
1 LSB Change at Major Carry
REV. 0
–3–
Range =
µ
µ
 ADuC816–SPECIFICATIONS
1
Parameter
ADuC816BS
Unit
Test Conditions/Comments
INTERNAL REFERENCE
ADC Reference
Reference Voltage
1.25
±
1%
V min/max
Initial Tolerance @ 25
°
C, V
DD
= 5 V
Power Supply Rejection
45
dBs typ
Reference Tempco
100
ppm/
°
C typ
DAC Reference
Reference Voltage
2.5
±
1%
V min/max
Initial Tolerance @ 25
°
C, V
DD
= 5 V
Power Supply Rejection
50
dBs typ
Reference Tempco
± 100
ppm/°C typ
ANALOG INPUTS/REFERENCE INPUTS
Primary ADC
Differential Input Voltage Ranges
8, 9
External Reference Voltage = 2.5 V
RN2, RN1, RN0 of ADC0CON Set to
Bipolar Mode (ADC0CON.3 = 0)
±
20
mV
0 0 0 (Unipolar Mode 0 mV to 20 mV)
± 40
mV
0 0 1 (Unipolar Mode 0 mV to 40 mV)
±
80
mV
0 1 0 (Unipolar Mode 0 mV to 80 mV)
± 160
mV
0 1 1 (Unipolar Mode 0 mV to 160 mV)
± 320
mV
1 0 0 (Unipolar Mode 0 mV to 320 mV)
±
640
mV
1 0 1 (Unipolar Mode 0 mV to 640 mV)
± 1.28
V
1 1 0 (Unipolar Mode 0 V to 1.28 V)
±
2.56
V
1 1 1 (Unipolar Mode 0 V to 2.56 V)
Analog Input Current
2
± 1
nA max
Analog Input Current Drift
± 5
pA/°C typ
Absolute AIN Voltage Limits
AGND + 100 mV
V min
AV
DD
– 100 mV
V max
Auxiliary ADC
Input Voltage Range
8, 9
0 to V
REF
V
Unipolar Mode, for Bipolar Mode
See Note 11
Average Analog Input Current
125
nA/V typ
Input Current Will Vary with Input
Average Analog Input Current Drift
2
± 2
pA/V/°C typ
Voltage on the Unbuffered Auxiliary ADC
Absolute AIN Voltage Limits
10
AGND – 30 mV
V min
AV
DD
+ 30 mV
V max
External Reference Inputs
REFIN(+) to REFIN(–) Range
2
1
V min
AV
DD
V max
Average Reference Input Current
1
µ
A/V typ
Both ADCs Enabled
Average Reference Input Current Drift
± 0.1
nA/V/°C typ
“NO Ext. REF” Trigger Voltage
0.3
V min
NOXREF Bit Active if V
REF
< 0.3 V
0.65
V max
NOXREF Bit Inactive if V
REF
> 0.65 V
ADC SYSTEM CALIBRATION
Full-Scale Calibration Limit
+1.05 × FS
V max
Zero-Scale Calibration Limit
–1.05
×
FS
V min
Input Span
0.8 × FS
V min
2.1 × FS
V max
ANALOG (DAC) OUTPUTS
Voltage Range
0 to V
REF
V typ
DACRN = 0 in DACCON SFR
0 to AV
DD
V typ
DACRN = 1 in DACCON SFR
Resistive Load
10
k
Ω
typ
From DAC Output to AGND
Capacitive Load
100
pF typ
From DAC Output to AGND
Output Impedance
0.5
Ω typ
I
SINK
50
µ
A typ
TEMPERATURE SENSOR
Accuracy
± 2
°C typ
Thermal Impedance (θ
JA
)
90
°C/W typ
–4–
REV. 0
ADuC816
Parameter
ADuC816BS
Unit
Test Conditions/Comments
TRANSDUCER BURNOUT CURRENT SOURCES
AIN+ Current
–100
nA typ
AIN+ is the Selected Positive Input to
the Primary ADC
AIN– Current
+100
nA typ
AIN– is the Selected Negative Input
the Auxiliary ADC
Initial Tolerance @ 25
°
C Drift
±
10
% typ
Drift
0.03
%/°C typ
EXCITATION CURRENT SOURCES
Output Current
–200
µ
A typ
Available from Each Current Source
Initial Tolerance @ 25°C
± 10
% typ
Drift
200
ppm/°C typ
Initial Current Matching @ 25
°
C
±
1
% typ
Matching Between Both Current Sources
Drift Matching
20
ppm/°C typ
Line Regulation (AV
DD
)
1
µ
A/V typ
AV
DD
= 5 V + 5%
Load Regulation
0.1
µA/V typ
Output Compliance
AV
DD
– 0.6
V max
AGND
min
LOGIC INPUTS
All Inputs Except SCLOCK, RESET,
and XTAL1
V
INL
, Input Low Voltage
0.8
V max
DV
DD
= 5 V
0.4
V max
DV
DD
= 3 V
V
INH
, Input High Voltage
2.0
V min
SCLOCK and RESET Only
(Schmitt-Triggered Inputs)
2
V
T+
1.3/3
V min/V max
DV
DD
= 5 V
0.95/2.5
V min/V max
DV
DD
= 3 V
V
T–
0.8/1.4
V min/V max
DV
DD
= 5 V
0.4/1.1
V min/V max
DV
DD
= 3 V
V
T+
– V
T–
0.3/0.85
V min/V max
DV
DD
= 5 V
0.3/0.85
V min/V max
DV
DD
= 3 V
Input Currents
Port 0, P1.2–P1.7,
EA
±
10
µ
A max
V
IN
= 0 V or V
DD
SCLOCK, SDATA/MOSI, MISO,
SS
11
–10 min, –40 max
µA min/µA max V
IN
= 0 V, DV
DD
= 5 V, Internal Pull-Up
±
10
µ
A max
V
IN
= V
DD
, DV
DD
= 5 V
RESET
± 10
µA max
V
IN
= 0 V, DV
DD
= 5 V
35 min, 105 max
µA min/µA max V
IN
= V
DD
, DV
DD
= 5 V,
Internal Pull-Down
P1.0, P1.1, Ports 2 and 3
± 10
µA max
V
IN
= V
DD
, DV
DD
= 5 V
–180
µ
A min
V
IN
= 2 V, DV
DD
= 5 V
–660
µA max
–20
µA min
V
IN
= 450 mV, DV
DD
= 5 V
–75
µ
A max
Input Capacitance
5
pF typ
All Digital Inputs
CRYSTAL OSCILLATOR (XTAL1 AND XTAL2)
Logic Inputs, XTAL1 Only
V
INL
, Input Low Voltage
0.8
V max
DV
DD
= 5 V
0.4
V max
DV
DD
= 3 V
V
INH
, Input High Voltage
3.5
V min
DV
DD
= 5 V
2.5
V min
DV
DD
= 3 V
XTAL1 Input Capacitance
18
pF typ
XTAL2 Output Capacitance
18
pF typ
REV. 0
–5–
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