UPSD3254 STMICROELECTRONICS [STMicroelectronics], UPSD3254 Datasheet - Page 17

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

52 PIN PACKAGE I/O PORT
The 52-pin package members of the uPSD325X
devices have the same port pins as those of the
80-pin package except:
Port Pin
Port 0 (P0.0-P0.7, external address/data bus
AD0-AD7)
Port 2 (P2.0-P2.3, external address bus A8-
A11)
GND
GND
GND
PC0
PC1
PC2
PC3
PC4
PC5
PC6
PC7
PD1
PD2
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
Vcc
Vcc
NC
NC
NC
Signal
TSTAT
CLKIN
Name
V
TERR
TMS
TDO
TCK
CSI
TDI
STBY
Pin No.
80
78
76
74
73
72
67
66
20
16
15
14
12
50
13
29
69
17
71
11
9
7
6
5
3
1
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
O
I
I
I
UPSD3254A, UPSD3254BV, UPSD3253B, UPSD3253BV
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
JTAG pin
JTAG pin
General I/O port pin
General I/O port pin
General I/O port pin
JTAG pin
JTAG pin
General I/O port pin
General I/O port pin
General I/O port pin
Basic
Port A (PA0-PA7)
Port D (PD2)
Bus control signal (RD,WR,PSEN,ALE)
Pin 5 requires a pull-up resistor (2k
vices, 7.5k
or without USB function.
Function
for 5V devices) for all devices, with
1. PLD Macro-cell outputs
2. PLD inputs
3. Latched Address Out (A0-A7)
1. PLD Macro-cell outputs
2. PLD inputs
3. SRAM stand by voltage input
4. SRAM battery-on indicator
5. JTAG pins are dedicated pins
1. PLD I/O
2. Clock input to PLD and APD
1. PLD I/O
2. Chip select to PSD Module
(V
(PC4)
STBY
)
Alternate
for 3V de-
17/175