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H8/3003 数据表(PDF) 260 Page - Renesas Technology Corp

部件名 H8/3003
功能描述  microcontroller (MCU)
PDF  715 Pages
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制造商  RENESAS [Renesas Technology Corp]
网页  http://www.renesas.com
标志 RENESAS - Renesas Technology Corp

H8/3003 数据表(HTML) 260 Page - Renesas Technology Corp

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Port 4 Data Register (P4DR): P4DR is an 8-bit readable/writable register that stores data for pins
P47 to P40.
When a bit in P4DDR is set to 1, if port 4 is read the value of the corresponding P4DR bit is
returned directly, regardless of the actual state of the pin. When a bit in P4DDR is cleared to 0, if
port 4 is read the corresponding pin level is read. This applies in both 8-bit and 16-bit bus modes.
P4DR is initialized to H'00 by a reset and in hardware standby mode. In software standby mode it
retains its previous setting.
Port 4 Input Pull-Up Control Register (P4PCR): P4PCR is an 8-bit readable/writable register
that controls the MOS input pull-up transistors in port 4.
In 8-bit bus mode, when a P4DDR bit is cleared to 0 (selecting generic input), if the
corresponding P4PCR bit is set to 1, the input pull-up transistor is turned on.
P4PCR is initialized to H'00 by a reset and in hardware standby mode. In software standby mode
it retains its previous setting.
Bit
Initial value
Read/Write
7
P4 DR
0
R/W
Port 4 data 7 to 0
These bits store data for port 4 pins
7
6
P4 DR
0
R/W
6
5
P4 DR
0
R/W
5
4
P4 DR
0
R/W
4
3
P4 DR
0
R/W
3
2
P4 DR
0
R/W
2
1
P4 DR
0
R/W
1
0
P4 DR
0
R/W
0
Bit
Initial value
Read/Write
7
P4 PCR
0
R/W
Port 4 input pull-up control 7 to 0
These bits control input pull-up transistors built into port 4
7
6
P4 PCR
0
R/W
6
5
P4 PCR
0
R/W
5
4
P4 PCR
0
R/W
4
3
P4 PCR
0
R/W
3
2
P4 PCR
0
R/W
2
1
P4 PCR
0
R/W
1
0
P4 PCR
0
R/W
0
242



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