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RL78/G1A CHAPTER 13 SERIAL INTERFACE IICA
13.3.8 Port mode register 6 (PM6)
This register sets the input/output of port 6 in 1-bit units.
When using the P60/SCLA0 pin as clock I/O and the P61/SDAA0 pin as serial data I/O, clear PM60 and PM61, and the
output latches of P60 and P61 to 0.
Set the IICE0 bit (bit 7 of IICA control register 00 (IICCTL00)) to 1 before setting the output mode because the
P60/SCLA0 and P61/SDAA0 pins output a low level (fixed) when the IICE0 bit is 0.
The PM6 register can be set by a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation sets this register to FFH.
Figure 13-12. Format of Port Mode Register 6 (PM6) (in Case of 64-pin Products)
PM60PM61PM62PM631111
PM6n pin I/O mode selection (n = 0 to 3)
Output mode (output buffer on)
Input mode (output buffer off)
PM6n
0
1
01234567
PM6
Address: FFF26H After reset: FFH R/W
Symbol
R01UH0305EJ0200 Rev.2.00 586
Jul 04, 2013