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H8/3021 Datasheet(PDF) 177 Page - Renesas Technology Corp

Part # H8/3021
Description  16-Bit Single-Chip Microcomputer
PDF  712 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

H8/3021 Datasheet(HTML) 177 Page - Renesas Technology Corp

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7. I/O Ports
Rev.2.00 Mar. 22, 2007 Page 153 of 684
REJ09B0352-0200
Port 6 Data Register (P6DR): P6DR is an 8-bit readable/writable register that stores data for pins
P6
5 to P63 and P60.
Bit
Initial value
Read/Write
7
—
1
—
6
—
0
R/W
5
P6
0
R/W
5
4
P6
0
R/W
4
3
P6
0
R/W
3
2
—
0
R/W
1
—
0
R/W
0
P6
0
R/W
0
Reserved bits
Port 6 data 5 to 3, 0
These bits store data for port 6 pins
When a bit in P6DDR is set to 1, if port 6 is read the value of the corresponding P6DR bit is
returned directly. When a bit in P6DDR is cleared to 0, if port 6 is read the corresponding pin level
is read. Bits 7, 6, 2, and 1 are reserved. Bit 7 cannot be modified and always reads 1. Bits 6, 2, and
1 can be written and read, but cannot be used as ports. If bit 6, 2, or 1 in P6DDR is read while its
value is 1, the value of the corresponding bit in P6DR will be read. If bit 6, 2, or 1 in P6DDR is
read while its value is 0, it will always read 1.
P6DR is initialized to H'80 by a reset and in hardware standby mode. In software standby mode it
retains its previous setting.



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