Page 58
5. I/O Ports
5.6 Port P5 (P54 to P50) (Large Current Port)
T
5CL8
5.6 Port P5 (P54 to P50) (Large Current Port)
Port P5 is an 5-bit input/output port.
Port P5 is also used as an I
2
C Bus input/output.
When used as an input port and I
2
C Bus input/output, the corresponding output latch (P5DR) should be set to "1".
During reset, the P5DR is initialized to "1".
P5 port output latch (P5DR) and P5 port terminal input (P5PRD) are located on their respective address.
When read the output latch data, the P5DR should be read. When read the terminal input data, the P5PRD register
should be read.
If a read instruction is executed for port P5, read data of bit 7 to 5 are unstable.
Note: i = 4 to 0
Figure 5-7 Port 5
P5DR
(0005H)
R/W
7
6
5
4
3
2
1
0
P54
P53
P52
P51
SDA
P50
SCL
(Initial value: ***1 1111)
P5PRD
(000FH)
Read only
P54
P53
P52
P51
P50
Data output (P5DR)
Control output
STOP
OUTEN
D
Q
P5i
Data input (P5PRD)
Output latch read (P5DR)
Control input
Output latch
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Страница 130: ...Page 8 1 4 Pin Names and Functions T5CL8 ...
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Страница 156: ...Page 34 2 Operational Description 2 3 Reset Circuit T5CL8 ...
Страница 186: ...Page 64 5 I O Ports 5 8 Port P7 P77 to P70 T5CL8 ...
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Страница 280: ...Page 158 13 Asynchronous Serial interface UART2 13 9 Status Flag T5CL8 ...
Страница 332: ...Page 210 16 Serial Bus Interface I2C Bus Ver D SBI 16 6 Data Transfer of I2C Bus T5CL8 ...
Страница 342: ...Page 220 17 10 bit AD Converter ADC 17 6 Precautions about AD Converter T5CL8 ...
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Страница 388: ...Page 266 21 Input Output Circuit 21 2 Input Output Ports T5CL8 ...
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