參數(shù)資料
型號(hào): UPSD3254B-24U1
廠商: 意法半導(dǎo)體
元件分類: 8位微控制器
英文描述: 8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash
中文描述: 8位微控制器與2/4/8K字節(jié)在系統(tǒng)可編程閃存
文件頁數(shù): 132/176頁
文件大小: 1214K
代理商: UPSD3254B-24U1
μPSD325X DEVICES
132/176
Ports A and B – Functionality and Structure
Ports A and B have similar functionality and struc-
ture, as shown in Figure 65. The two ports can be
configured to perform one or more of the following
functions:
I
MCU I/O Mode
I
CPLD Output – Macrocells McellAB7-McellAB0
can be connected to Port A or Port B. McellBC7-
McellBC0 can be connected to Port B or Port C.
I
CPLD Input – Via the Input Macrocells (IMC).
I
Latched Address output – Provide latched
address output as per Table 94.
I
Open Drain/Slew Rate – pins PA3-PA0 and
PB3-PB0 can be configured to fast slew rate,
pins PA7-PA4 and PB7-PB4 can be configured
to Open Drain Mode.
I
Peripheral Mode – Port A only (80-pin package)
Figure 65. Port A and Port B Structure
M
DATA OUT
REG.
D
Q
D
G
Q
D
Q
D
Q
WR
WR
WR
ADDRESS
MACROCELL OUTPUTS
ENABLE PRODUCT TERM (.OE)
ALE
READ MUX
P
D
B
CPLD-INPUT
CONTROL REG.
DIR REG.
INPUT
MACROCELL
ENABLE OUT
DATA IN
OUTPUT
SELECT
OUTPUT
MUX
PORT
A OR B PIN
DATA OUT
ADDRESS
A[7:0]
AI06605
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