R8C13 Datasheet, PDF (159/224 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY/R8C/Tiny SERIES

R8C/13 Group
15. Programmable I/O Ports
Table 15.13 Port P14/TXD0 Setting
Register PD1 PUR0 DRR
U0MR U0C0
Bit PD1_4 PU03 DRR4 SMD2, SMD0 NCH
Function
0
0
X
002
X Input port (not pulled up)
0
1
X
002
X Input port (pulled up)
1
X
0
002
X Output port
1
X
1
002
X Output port (High drive)
X1
X
X
0
1X
0 TXD0 output, CMOS output
Setting value
X1
X
X
1
1X
0 TXD0 output, CMOS output (High drive)
X1
X
X
0
1X
1 TXD0 output, N-channel open output
X1
X
X
1
1X
1 TXD0 output, N-channel open output (High drive)
X: “0” or “1”
Table 15.14 Port P15/RXD0 Setting
Register PD1 PUR0 DRR
Bit PD1_5 PU03 DRR5
0
0
X Input port (not pulled up)
0
1
X Input port (pulled up)
Setting value 0
0
X RXD0 input
1
X
0 Output port
1
X
1 Output port (High drive)
X: “0” or “1”
Function
Table 15.15 Port P16/CLK0 Setting
Register PD1 PUR0 DRR
U0MR
Bit PD1_6 PU03 DRR6 SMD2, SMD0, CKDIR
0
0
X
Other than 0102
0
1
X
Other than 0102
0
0
X
XX1
Setting value 1
X
0
Other than 0102
1
X
1
Other than 0102
X
X
0
0102
X
X
1
0102
X: “0” or “1”
Function
Input port (not pulled up)
Input port (pulled up)
CLK0 (external clock) input
Output port
Output port (High drive)
CLK0 (internal clock) output
CLK0 (internal clock) output (High drive)
Rev.1.20 Jan 27, 2006 page 148 of 205
REJ09B0111-0120