UPSD3254 STMICROELECTRONICS [STMicroelectronics], UPSD3254 Datasheet - Page 120

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

UPSD3254A, UPSD3254BV, UPSD3253B, UPSD3253BV
Figure 58. PLD Diagram
Note: 1. Ports A is not available in the 52-pin package
120/175
DATA
BUS
73
73
DIRECT MACROCELL INPUT TO MCU DATA BUS
16
20
2
8
OUTPUT MACROCELL FEEDBACK
DECODE PLD
INPUT MACROCELL & INPUT PORTS
REGISTER
PAGE
CPLD
PORT D INPUTS
ALLOC.
PT
8
4
1
1
2
20 INPUT MACROCELL
(PORT A,B,C)
MACROCELL
16 OUTPUT
PRIMARY FLASH MEMORY SELECTS
SECONDARY NON-VOLATILE MEMORY SELECTS
SRAM SELECT
CSIOP SELECT
PERIPHERAL SELECTS
DIRECT MACROCELL ACCESS FROM MCU DATA BUS
MACROCELL
ALLOC.
EXTERNAL CHIP SELECTS
TO PORT A OR B 1
TO PORT B OR C
TO PORT D
MCELLAB
MCELLBC
AI06600
8
8
2