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CHAPTER 5 PORT FUNCTIONS
Page 81 of 920
5.3.4
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 5 - 4 Format of Port input mode register
Caution
Be sure to set bits that are not mounted to their initial values.
Symbol
7
6
5
4
3
2
1
0
Address
After reset
R/W
0
0
0
PIM04 PIM03
0
0
0
0
0
0
0
0
0
PIM81 PIM80
0
0
0
0
PIM143 PIM142
0
0
PIMmn
Pmn pin input buffer selection (m = 0, 1, 3 to 5, 8, 14; n = 0 to 7)
0
Normal input buffer
1
TTL input buffer
Содержание RL78/G1H
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