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HD6433644R Datasheet(PDF) 213 Page - Renesas Technology Corp

Part # HD6433644R
Description  8-Bit Single-Chip Microcomputer
PDF  549 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD6433644R Datasheet(HTML) 213 Page - Renesas Technology Corp

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Section 8 I/O Ports
Rev. 6.00 Sep 12, 2006 page 193 of 526
REJ09B0326-0600
Port Data Register 7 (PDR7)
Bit
7
6
5
4
3
2
1
0
P77
P76
P75
P74
P73
Initial value
0
0
0
0
0
0*
0*
0*
Read/Write
R/W
R/W
R/W
R/W
R/W
Note:
* Bits 2 to 0 are reserved; they are always read as 0 and cannot be modified.
PDR7 is an 8-bit register that stores data for port 7 pins P77 to P73. If port 7 is read while PCR7
bits are set to 1, the values stored in PDR7 are read, regardless of the actual pin states. If port 7 is
read while PCR7 bits are cleared to 0, the pin states are read.
Upon reset, PDR7 is initialized to H'00.
Port Control Register 7 (PCR7)
Bit
7
6
5
4
3
2
1
0
PCR77
PCR76
PCR75
PCR74
PCR73
Initial value
0
0
0
0
0
0
0
0
Read/Write
W
W
W
W
W
PCR7 is an 8-bit register for controlling whether each of the port 7 pins P77 to P73 functions as an
input pin or output pin. Setting a PCR7 bit to 1 makes the corresponding pin an output pin, while
clearing the bit to 0 makes the pin an input pin.
Upon reset, PCR7 is initialized to H'00.
PCR7 is a write-only register, which always reads as all 1s.



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