RL78/F13, F14 CHAPTER 14 COMPARATOR (RL78/F14 Only)
R01UH0368EJ0210 Rev.2.10 785
Dec 10, 2015
14.2.7 Port mode register 4 (PM4)
This register is used to set input/output of port 4 in 1-bit units.
When using the port (P41/VCOUT0) to be shared with the comparator output pin, set the corresponding bit in the port
mode register 4 (PM4) and port mode register 4 (P4) to 0.
Example)
When P41/VCOUT0 is used for comparator output pin
Set the PM41 bit in the port mode register 4 to 0.
Set the P41 bit in the port register 4 to 0.
The PM4 register can be set by a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation sets this register to 00H.
Figure 14-8. Format of Port Mode Register 4 (PM4) (100-Pin Products)
Address: FFF24H After reset: FFH
Symbol 7 6 5 4 3 2 1 0
PM4 PM47 PM46 PM45 PM44 PM43 PM42 PM41 PM40
PM4n P4n pin input/output mode selection (n = 0 to 7) R/W
0 0: Output mode (output buffer on) R/W
1 1: Input mode (output buffer off)
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