RL78/F13, F14 CHAPTER 7 TIMER RJ
R01UH0368EJ0210 Rev.2.10 555
Dec 10, 2015
7.3.9 Port mode registers 1, 4 (PM1, PM4)
These registers set input/output of ports 1 and 4 in 1-bit units.
When using the ports (such as P41/TRJIO0 and P10/TRJO0) to be shared with the timer output pin for timer output,
set the port mode register (PMxx) bit and the port register (Pxx) bit corresponding to each port to 0.
Example: When using P41/TRJIO0 for timer output
Set the PM41 bit of port mode register 4 to 0.
Set the P41 bit of port register 4 to 0.
When using the ports (such as P41/TRJIO0) to be shared with the timer input pin for timer input, set the port mode
register (PMxx) bit corresponding to each port to 1. At this time, the port register (Pxx) bit may be 0 or 1.
Example: When using P41/TRJIO0 for timer input
Set the PM41 bit of port mode register 4 to 1.
Set the P41 bit of port register 4 to 1.
The PM1 and PM4 registers can be set by a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation sets these registers to FFH.
Figure 7-10. Format of Port Mode Registers 1, 4 (PM1, PM4) (100-pin products)
Address: FFF21H After reset: FFH R/W
Symbol 7 6 5 4 3 2 1 0
PM1 PM17 PM16 PM15 PM14 PM13 PM12 PM11 PM10
Address: FFF24H After reset: FFH R/W
Symbol 7 6 5 4 3 2 1 0
PM4 PM47 PM46 PM45 PM44 PM43 PM42 PM41 PM40
PMmn Pmn pin I/O mode selection (m = 1, 4 ; n = 0 to 7)
0 Output mode (output buffer on)
1 Input mode (output buffer off)
Remark The figure shown above presents the format of port mode registers 1 and 4 of the 100-pin products. The format
of the port mode register of other products, see 4.5 Settings of Port Mode Register and Output Latch When
Using Alternate Function.
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