Renesas Hitachi H8S/2191, Hardware Manual

Page: 311 / 1065

Rev. 2.0, 11/00, page 284 of 1037
(1) Port Mode Register 8 (PMR8)
0
0
1
0
R/W
2
0
R/W
3
0
4
1 1
5 6
1
7
— — — —
— — — —
PMR83 PMR82 PMR81 PMR80
1
R/W R/W
Bit :
Initial value :
R/W :
Port mode register 8 (PMR8) controls switching of each pin function of port 8. The switching is
specified in a unit of bit.
PMR8 is an 8-bit read/write enable register. When reset, PMR8 is initialized to H'F0.
If the EXCAP and EXTTRG input pins are set, the pin level need always be set to the high or
low level regardless of the active mode and low power consumption mode. Note that the pin
level must not reach an intermediate level.
Bits 7 to 4: Reserved Bits
When the bits are read, 1 is always read. The write operation is valid.
Bit 3: P83/SV2 Pin Switching (PMR83)
PMR83 sets whether the P83/SV2 pin is used as a P83 I/O pin or an SV2 pin for the servo
monitor output. For the selection of the SV2 output, see section 28, Servo Circuit.
Bit 3
PMR83 Description
0 The P83/SV2 pin functions as a P83 I/O pin (Initial value)
1 The P83/SV2 pin functions as an SV2 output pin
Bit 2: P82/SV1 Pin Switching (PMR82)
PMR82 sets whether the P82/SV1 pin is used as a P82 I/O pin or an SV1 pin for the servo
monitor output. For the selection of the SV1 output, see section 27, Servo Circuit.
Bit 2
PMR82 Description
0 The P82/SV1 pin functions as a P82 I/O pin (Initial value)
1 The P82/SV1 pin functions as an SV1 output pin