參數(shù)資料
型號: PSD4256G6V-10UIT
廠商: STMICROELECTRONICS
元件分類: 微控制器/微處理器
英文描述: 1M X 8 FLASH, 52 I/O, PIA-GENERAL PURPOSE, PQFP80
封裝: PLASTIC, TQFP-80
文件頁數(shù): 115/127頁
文件大小: 1091K
代理商: PSD4256G6V-10UIT
I/O ports
PSD4256G6V
19.22
Ports A, B and C – Functionality and Structure
Ports A, B, and C have similar functionality and structure, as shown in Figure 33. The ports
can be configured to perform one or more of the following functions:
MCU I/O mode
CPLD Output – macrocells McellA7-McellA0 can be connected to Port A. McellB7-
McellB0 can be connected to Port B. External Chip Select (ECS7-ECS0) can be
connected to Port C or Port F.
CPLD Input – Via the input macrocells (IMC).
Address In – Additional high address inputs using the input macrocells (IMC).
Open Drain – pins PA7-PA0 can be configured to Open Drain mode.
Figure 33.
Port A, B, and C structure
INTERNAL
DATA
BUS
DATA OUT
Register
DQ
WR
MCELLA7-MCELLA0 (Port A)
MCELLB7-MCELLB0 (Port B)
Ext.CS (Port C)
ENABLE PRODUCT TERM (.OE)
READ MUX
P
D
B
CPLD - INPUT
DIR Register
INPUT
MACROCELL
ENABLE OUT
DATA IN
OUTPUT
MUX
PORT Pin
DATA OUT
AI04936B
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