Renesas R8C series User Manual

R8C/1A Group, R8C/1B Group 5. Programmable I/O Ports
Rev.1.30 Dec 08, 2006 Page 36 of 315
REJ09B0252-0130
X: 0 or 1
X: 0 or 1
X: 0 or 1
Table 5.15 Port P3_7/CNTR0/SSO/TXD1
Register PD3 PUR0 U1MR
SSU (Refer to
Table 16.4
Association between
Communication Modes
and I/O Pins
)
TXMR UCON
Function
Bit PD3_7 PU07
SMD2,
SMD1, SMD0
SSO Output
Control
SSO Input
Control
TXOCNT
U1SEL1,
U1SEL0
Setting
Value
0 0 000b 0 0 0 0Xb Input port (not pulled up)
0 1 000b 0 0 0 0Xb Input port (pulled up)
1 X 000b 0 0 0 0Xb Output port
XX
001b
0 0 X 11b TXD1 output pin
100b
101b
110b
X X 000b 0 0 1 XXb CNTR0
output pin
X X XXXb 0 1 X XXb SSO input pin
X X XXXb 1 0 X XXb SSO output pin
Table 5.16 Port XIN/P4_6, XOUT/P4_7
Register CM1 CM1 CM0 Circuit Specification
Function
Bit CM13 CM10 CM05
Oscillation
Buffer
Feedback
Resistance
Setting
Value
1 1 1 OFF OFF XIN-XOUT oscillation stop
101OFFON
External input to XIN pin, “H” output
from XOUT pin
1 0 1 OFF ON XIN-XOUT oscillation stop
1 0 0 ON ON XIN-XOUT oscillation
0 X X OFF OFF Input port
Table 5.17 Port P4_5/INT0/RXD1
Register PD4 PUR1 UCON INTEN
Function
Bit PD4_5 PU11 U1SEL1, U1SEL0 INT0EN
Setting
Value
0 0 00b 0 Input port (not pulled up)
0 1 00b 0 Input port (pulled up)
0 0 00b 1 INT0
input (not pulled up)
0 1 00b 1 INT0
input (pulled up)
X0
01b
0 RXD1 input
11b
1 X 00b X Output port

Renesas R8C series Specifications

General

Brand	Renesas
Model	R8C series
Category	Computer Hardware
Language	English