
R8C/14 Group, R8C/15 Group 17. Programmable I/O Ports
Rev.2.10 Jan 19, 2006 Page 189 of 253
REJ09B0164-0210
X: “0” or “1”
X: “0” or “1”
X: “0” or “1”
X: “0” or “1”
Table 17.14 Port P3_5/SSCK/CMP1_2 Setting
Register PD3 PUR0
SSU (Refer to
Table 15.3 Association
between Communication Modes and I/O
Pins)
TCOUT
Function
Bit PD3_5 PU07 SSCK Output Control SSCK Input Control TCOUT5
Setting
Value
0 0 0 0 0 Input port (not pulled up)
0 1 0 0 0 Input port (pulled up)
0 0 0 1 0 SSCK input
1 X 0 0 0 Output port
X X 0 0 1 CMP1_2 output
X X 1 0 X SSCK output
Table 17.15 Port P3_7/CNTR0/SSO Setting
Register PD3 PUR0
SSU (Refer to
Table 15.3 Association
between Communication Modes and
I/O Pins)
TXMR UCON
Function
Bit PD3_7 PU07
SSO Output
Control
SSO Input
Control
TXOCNT
U1SEL1,
U1SEL0
Setting
Value
0 0 0 0 0 0Xb Input port (not pulled up)
0 1 0 0 0 0Xb Input port (pulled up)
1 X 0 0 0 0Xb Output port
X X 0 0 1 XXb CNTR0
output pin
X X 0 1 X XXb SSO input pin
X X 1 0 X XXb SSO output pin
Table 17.16 Port XIN/P4_6, XOUT/P4_7 Setting
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 17.17 Port P4_5/INT0 Setting
Register PD4 PUR1 INTEN
Function
Bit PD4_5 PU11 INT0EN
Setting
Value
0 0 0 Input port (not pulled up)
0 1 0 Input port (pulled up)
001INT0
input
1 X X Output port
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