Datasheet
REV. 0–8–
ADuC831
PIN CONFIGURATION
WATCHDOG
TIMER
256 BYTES USER
RAM
POWER SUPPLY
MONITOR
TEMP
SENSOR
BAND GAP
REFERENCE
AV
DD
AGND
DV
DD
DV
DD
DV
DD
DGND
DGND
DGND
RESET
POR
SDATA\MOSI
MISO
SS
XTAL1
ADuC831
ADC
CONTROL
AND
CALIBRATION
DAC1
DAC
CONTROL
12-BIT
VOLTAGE
OUTPUT DAC
T0
T1
T2EX
T2
INT0
INT1
EA
PSEN
ALE
SINGLE-PIN
EMULATOR
TxD
RxD
4 kBYTES DATA
FLASH/EE
62 kBYTES PROGRAM
FLASH/EE INCLUDING
USER DOWNLOAD
MODE
ASYNCHRONOUS
SERIAL PORT
(UART)
8052
MCU
CORE
DOWNLOADER
DEBUGGER
SYNCHRONOUS
SERIAL INTERFACE
(I
2
C AND SPI )
16-BIT
COUNTER
TIMERS
TIME INTERVAL
COUNTER
(WAKEUP CCT)
XTAL2
OSC
2 kBYTES USER XRAM
2 ⴛ DATA POINTERS
11-BIT STACK POINTER
12-BIT
VOLTAGE
OUTPUT DAC
MUX
...
...
12-BIT
ADC
ADC0
ADC1
ADC6
ADC7
DAC0
MUX
16-BIT
⌺-⌬ DAC
PWM0
PWM1
16-BIT
PWM
16-BIT
PWM
PWM
CONTROL
16-BIT
⌺-⌬ DAC
T/H
V
REF
C
REF
BUF
UART
TIMER
SCLOCK
Figure 1. ADuC831 Block Diagram (Shaded areas are features not present on the ADuC812)
P1.1/ADC1/T2EX
P1.2/ADC2
P1.3/ADC3
AV
DD
AV
DD
AGND
AGND
AGND
C
REF
V
REF
DAC0
DAC1
P1.4/ADC4
P1.5/ADC5/SS
P1.6/ADC6
P.7/ADC7
RESET
P3.0/RxD
P3.1/TxD
P3.2/INT0
P3.3/INT1/MISO/PWM1
DV
DD
DGND
P3.4/T0/PWMC/PWM0
P3.5/T1/CONVST
P3.6/WR
P3.7/RD
SCLOCK
P2.7/A15/A23
P2.6/A14/A22
P2.5/A13/A21
P2.4/A12/A20
DGND
DGND
DV
DD
XTAL1
P2.3/A11/A19
P2.2/A10/A18
P2.1/A9/A17
P2.0/A8/A16
SDATA/MOSI
P1.0/ADC0/T2
P0.7/AD7
P0.6/AD6
P0.5/AD5
P0.4/AD4
DV
DD
DGND
P0.3/AD3
P0.2/AD2
P0.1/AD1
P0.0/AD0
ALE
PSEN
EA
14
1
2
3
4
5
6
7
8
9
10
11
13
12
15
16
17
18
19
20
21
22
23
24
25
26
27
28
42
41
40
39
38
37
36
35
34
33
32
31
30
29
43
45
46
47
48
49
50
51
52
53
54
55
56
PIN 1
IDENTIFIER
44
ADuC831 56-LEAD CSP
TOP VIEW
(Not to Scale)
XTAL2
52 51 50 49 48 43 42 41 4047 46 45 44
14 15 16 17 18 19 20 21 22 23 24 25 26
1
2
3
4
5
6
7
8
9
10
11
13
12
PIN 1
IDENTIFIER
TOP VIEW
(Not to Scale)
39
38
37
36
35
34
33
32
31
30
29
28
27
ADuC831 52-LEAD PQFP
P0.7/AD7
P0.6/AD6
P0.5/AD5
P0.4/AD4
DV
DD
DGND
P0.3/AD3
P0.2/AD2
P0.1/AD1
P0.0/AD0
ALE
PSEN
EA
P1.7/ADC7
RESET
P3.0/RXD
P3.1/TXD
P3.2/INT0
P3.3/INT1/MISO/PWM0
DV
DD
P3.4/T0/PWMC/PWM1
P3.5/T1/CONVST
P3.6/WR
P3.7/RD
SCLOCK
P1.0/ADC0/T2
P1.1/ADC1/T2EX
P1.2/ADC2
P1.3/ADC3
AV
DD
AGND
C
REF
V
REF
DAC0
DAC1
P1.4/ADC4
P1.5/ADC5/SS
P1.6/ADC6
P2.7/PWM1/A15/A23
P2.6/PWM0/A14/A22
P2.5/A13/A21
P2.4/A12/A20
DGND
DV
DD
XTAL2
XTAL1
P2.3/A11/A19
P2.2/A10/A18
P2.1/A9/A17
P2.0/A8/A16
SDATA/MOSI
DGND