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RL78/G1A CHAPTER 4 PORT FUNCTIONS
R01UH0305EJ0200 Rev.2.00 108
Jul 04, 2013
4.3.4 Port input mode registers (PIMxx)
These registers set the input buffer in 1-bit units.
TTL input buffer can be selected during serial communication with an external device of the different potential.
Port input mode registers can be set by a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation clears these registers to 00H.
Figure 4-4. Format of Port Input Mode Register
Symbol 7 6 5 4 3 2 1 0 Address After reset R/W
PIM0 0 0 0 PIM04 PIM03 0 PIM01 PIM00 F0040H 00H R/W
PIM1 0 PIM16 PIM15 PIM14 0 0 PIM11 PIM10 F0041H 00H R/W
PIMmn
Pmn pin input buffer selection
(m = 0, 1 ; n = 0, 1, 3 to 6)
0 Normal input buffer
1 TTL input buffer
Caution Be sure to set bits that are not mounted to their initial values.
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