Renesas Hitachi H8S/2191, Hardware Manual, Page: 302 / 1065

Rev. 2.0, 11/00, page 275 of 1037
(2) Port Control Register 6 (PCR6)
0
0
1
0
W
2
0
W
3
0
4
0
W
0
W
5 6
0
7
PCR64 PCR63 PCR62 PCR61 PCR60
0
W
PCR67
W W W
PCR66 PCR65
Bit :
Initial value :
R/W :
Port control register 6 (PCR6) selects the general I/O of port 6 and controls the realtime output
in a unit of bit together with PMR6.
When PMR6 = 0, the corresponding P67 to P60 pins become general output pins if PCR6 is set
to 1, and they become general input pins if it is set to 0.
When PMR6 = 1, PCR6 controls the corresponding RP7 to RP0 realtime output pins. For
details, see section 11.8.4, Operation.
PCR6 is an 8-bit write-only register. When PCR6 is read, 1 is read. When reset, PCR6 is
initialized to H'00.
PMR6 PCR6
Bit n Bit n
PMR6n PCR6n Description
0 The P6n/RPn pin functions as a P6n general I/O input pin
(Initial value)
0
1 The P6n/RPn pin functions as a P6n general output pin
1 * The P6n/RPn pin functions as an RPn realtime output pin
Note:
*
Don't care. (n = 7 to 0)
(3) Port Data Register 6 (PDR6)
0
0
1
0
R/W
2
0
R/W
3
0
4
0
R/W
0
R/W
5 6
0
7
PDR64 PDR63 PDR62 PDR61 PDR60
0
R/W
PDR67
R/W R/W R/W
PDR66 PDR65
Bit :
Initial value :
R/W :
Port data register 6 (PDR6) stores the data for the pins P67 to P60 of port 6.
For PMR6 = 0, when PCR6 is 1 (output), the PDR6 values are directly read if port 6 is read.
Accordingly, the pin states are not affected. When PCR6 is 0 (input), the pin states are read if
port 6 is read.
For PMR6 = 1, port 6 becomes a realtime output pin. For details, see section 11.8.4, Operation.
PDR6 is an 8-bit read/write enable register. When reset, PDR6 is initialized to H'00.