RL78/G10 CHAPTER 4 PORT FUNCTIONS
R01UH0384EJ0311 Rev. 3.11 61
Dec 22, 2016
4.3.1 Port mode registers 0, 4 (PM0, PM4)
These registers specify input or output mode for the port in 1-bit units.
These registers can be set by a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation sets these registers to FFH.
When port pins are used as alternate-function pins, set the port mode register by referring to 4.5 Register Settings
When an Alternate Function Is Used .
Figure 4-1. Format of Port Mode Registers 0, 4 (PM0, PM4)
10-pin products
Symbol 7 6 5 4 3 2 1 0 Address After reset R/W
PM0 1 1 1 PM04 PM03 PM02 PM01 PM00 FFF20H FFH R/W
PM4 1 1 1 1 1 1 1 PM40 FFF24H FFH R/W
16-pin products
Symbol 7 6 5 4 3 2 1 0 Address After reset R/W
PM0 PM07 PM06 PM05 PM04 PM03 PM02 PM01 PM00 FFF20H FFH R/W
PM4 1 1 1 1 1 1 PM41 PM40 FFF24H FFH R/W
PMmn Pmn pin I/O mode selection
0 Output mode (output buffer on)
1 Input mode (output buffer off)
m = 0, 4; n = 0 to 7
Caution Be sure to set bits that are not mounted to their initial values.
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