UPSD3234AV-24U1T STMicroelectronics, UPSD3234AV-24U1T Datasheet - Page 11

• Manufacturer Part Number: UPSD3234AV-24U1T
• Description: Flash Programmable System Devices with 8032 Microcontroller Core and 64Kbit SRAM
• Manufacturer: STMicroelectronics

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Port Pin
P4.4
P4.5
P4.6
P4.7
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
RESET_
PSEN_
Signal
PWM1
PWM2
PWM3
PWM4
XTAL1
XTAL2
Name
USB–
V
WR_
RD_
ALE
REF
Pin No.
25
23
19
18
70
65
62
63
68
48
49
35
34
32
28
26
24
22
21
80
78
76
74
73
72
67
66
8
4
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
O
O
O
O
O
O
I
I
uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV
General I/O port pin
General I/O port pin
General I/O port pin
General I/O port pin
Pull-up resistor required (2k
devices, 7.5k
Reference Voltage input for ADC
READ signal, external bus
WRITE signal, external bus
PSEN signal, external bus
Address Latch signal, external bus
Active low RESET input
Oscillator input pin for system clock
Oscillator output pin for system clock
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
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
for 5V devices)
for 3V
Function
8-bit Pulse Width Modulation
output 1
8-bit Pulse Width Modulation
output 2
8-bit Pulse Width Modulation
output 3
Programmable 8-bit Pulse Width
modulation output 4
1.
2.
3.
4.
1.
2.
3.
PLD Macro-cell outputs
PLD inputs
Latched Address Out (A0-
A7)
Peripheral I/O Mode
PLD Macro-cell outputs
PLD inputs
Latched Address Out (A0-
A7)
Alternate
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