UPSD3254 STMICROELECTRONICS [STMicroelectronics], UPSD3254 Datasheet - Page 15

• Manufacturer Part Number: UPSD3254
• Description: Flash Programmable System Devices with 8032 Microcontroller Core
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Table 2. 80-Pin Package Pin Description
Port Pin
P0.0
P0.1
P0.2
P0.3
P0.4
P0.5
P0.6
P0.7
P1.0
P1.1
P1.2
P1.3
P1.4
P1.5
P1.6
P1.7
P2.0
P2.1
P2.2
P2.3
P3.0
P3.1
P3.2
P3.3
P3.4
P3.5
P3.6
P3.7
P4.0
P4.1
P4.2
VSYNC
Signal
Name
ADC0
ADC1
ADC2
ADC3
SDA2
SDA1
T2EX
RxD2
RxD1
SCL2
SCL1
TxD2
TxD1
INTO
INT1
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
A10
A11
T2
A8
A9
T0
T1
Pin No.
36
37
38
39
41
43
45
47
52
54
56
58
59
60
61
64
51
53
55
57
75
77
79
40
42
44
46
33
31
30
2
In/Out
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
O
O
O
O
UPSD3254A, UPSD3254BV, UPSD3253B, UPSD3253BV
External Bus
Multiplexed Address/Data bus A1/D1
Multiplexed Address/Data bus A0/D0
Multiplexed Address/Data bus A2/D2
Multiplexed Address/Data bus A3/D3
Multiplexed Address/Data bus A4/D4
Multiplexed Address/Data bus A5/D5
Multiplexed Address/Data bus A6/D6
Multiplexed Address/Data bus A7/D7
General I/O port pin
General I/O port pin
General I/O port pin
General I/O port pin
General I/O port pin
General I/O port pin
General I/O port pin
General I/O port pin
External Bus, Address A8
External Bus, Address A9
External Bus, Address A10
External Bus, Address A11
General I/O port pin
General I/O port pin
General I/O port pin
General I/O port pin
General I/O port pin
General I/O port pin
General I/O port pin
General I/O port pin
General I/O port pin
General I/O port pin
General I/O port pin
Basic
Function
Timer 2 Count input
Timer 2 Trigger input
2nd UART Receive
2nd UART Transmit
ADC Channel 0 input
ADC Channel 1 input
ADC Channel 2 input
ADC Channel 3 input
UART Receive
UART Transmit
Interrupt 0 input / Timer 0 gate
control
Interrupt 1 input / Timer 1 gate
control
Counter 0 input
Counter 1 input
I
I
I
interface
I
VSYNC input for DDC interface
2
2
2
2
C Bus serial data I/O
C Bus clock I/O
C serial data I/O for DDC
C clock I/O for DDC interface
Alternate
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