参数资料
型号: UPD70F3271YGF-JBT-A
元件分类: 微控制器/微处理器
英文描述: 32-BIT, FLASH, 32 MHz, MICROCONTROLLER, PQFP100
封装: 14 X 20 MM, PLASTIC, QFP-100
文件页数: 19/129页
文件大小: 8549K
代理商: UPD70F3271YGF-JBT-A
CHAPTER 4 PORT FUNCTIONS
User’s Manual U16541EJ5V1UD
115
4.3.4
Port 4
Port 4 is a 3-bit port that controls I/O in 1-bit units.
Port 4 includes the following alternate-function pins.
Table 4-7. Port 4 Alternate-Function Pins
Pin No.
Pin Name
GF
GC
Alternate-Function Pin Name
I/O
Remark
Block Type
P40
24
22
SIB0/SDA01
Note
I/O
G-6
P41
25
23
SOB0/SCL01
Note
I/O
G-12
P42
26
24
SCKB0
I/O
Selectable as N-ch open-drain output
E-3
Note
I
2C bus versions (Y products) only
Caution
The P40 to P42 pins have hysteresis characteristics in the input mode of the alternate-function
pin, but do not have the hysteresis characteristics in the port mode.
Remark
GF: 100-pin plastic QFP (14
× 20)
GC: 100-pin plastic LQFP (fine pitch) (14
× 14)
(1) Port 4 register (P4)
0
Outputs 0
Outputs 1
P4n
0
1
Output data control (in output mode) (n = 0 to 2)
P4
0
P42
P41
P40
After reset: 00H (output latch)
R/W
Address: FFFFF408H
(2) Port 4 mode register (PM4)
1
Output mode
Input mode
PM4n
0
1
I/O mode control (n = 0 to 2)
PM4
1
PM42
PM41
PM40
After reset: FFH
R/W
Address: FFFFF428H
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