Renesas Hitachi H8S/2191, Hardware Manual, Page: 313 / 1065

Rev. 2.0, 11/00, page 286 of 1037
(3) Port Data Register 8 (PDR8)
0
0
1
0
R/W
2
0
R/W
3
0
4
0
R/W
0
R/W
5 6
0
7
PDR84 PDR83 PDR82 PDR81 PDR80
0
R/W
PDR87
R/W R/W R/W
PDR86 PDR85
Bit :
Initial value :
R/W :
Port data register 8 (PDR8) stores the data for the pins P87 to P80 of port 8.
When PCR8 is 1 (output), the PDR8 values are directly read if port 8 is read. Accordingly, the
pin states are not affected. When PCR8 is 0 (input), the pin states are read if port 8 is read.
PDR8 is an 8-bit read/write enable register. When reset, PDR8 is initialized to H'00.
11.10.3 Pin Functions
This section describes the port 8 pin functions and their selection methods.
(1) P87 to P84
P87 to P84 are switched as shown below according to the PCR8n bit in PCR8.
PCR8n Pin Function
0 P8n input pin
1 P8n output pin
(n = 7 to 4)
Note: * Don't care.
(2) P83/SV2
P83/SV2 is switched as shown below according to the PMR83 bit in PMR8 and the PCR83
bit in PCR8.
PMR83 PCR83 Pin Function
0 P83 input pin 0
1 P83n output pin
1
*
SV2 output pin
Note:
*
Don't care.