参数资料
型号: ST72C254G1B7
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 6 MHz, MICROCONTROLLER, PDIP32
封装: SHRINK, PLASTIC, DIP-32
文件页数: 61/136页
文件大小: 929K
代理商: ST72C254G1B7
ST72104G, ST72215G, ST72216G, ST72254G
30/136
I/O PORTS (Cont’d)
Table 7. I/O Port Configurations
Notes:
1. When the I/O port is in input configuration and the associated alternate function is enabled as an output,
reading the DR register will read the alternate function output status.
2. When the I/O port is in output configuration and the associated alternate function is enabled as an input,
the alternate function reads the pin status given by the DR register content.
Hardware Configu ration
INPUT
1)
OPEN-DRAIN
OUTPUT
2)
PUSH-PULL
OUTPUT
2)
CONFIGURATION
PAD
VDD
RPU
EXTERNAL INTERRU PT
POLARITY
DATA BUS
PULL-UP
INTERRUPT
DR REGISTER ACCESS
W
R
FROM
OTHER
PINS
SOURCE (eix)
SELECTI ON
DR
REGISTER
CONFIG URATION
ALTERNATE INPUT
NOT IMPLEMENTED IN
TRUE OPEN DRAIN
I/O PORTS
ANALOG INPUT
PAD
RPU
DATA BUS
DR
DR REGIST ER ACCESS
R/W
VDD
ALTERNATE
ENAB LE
OUTPUT
REGIST ER
NOT IMPLEMENTED IN
TRUE OPEN DRAIN
I/O PORTS
PAD
RPU
DATA BUS
DR
DR REGIST ER ACCESS
R/W
VDD
ALTERNATE
ENAB LE
OUTPUT
REGIST ER
NOT IMPLEMENTED IN
TRUE OPEN DRAIN
I/O PORTS
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