R8C/1A Group, R8C/1B Group 5. Electrical Characteristics
Rev.1.40 Dec 08, 2006 Page 38 of 45
REJ03B0144-0140
Timing Requirements
(Unless otherwise specified: V
CC = 5 V, VSS = 0 V at Ta = 25 °C) [ VCC = 5 V ]
Figure 5.8 XIN
Input Timing Diagram when VCC = 5 V
Figure 5.9 CNTR0 Input, CNTR1 Input, INT1
Input Timing Diagram when VCC = 5 V
NOTES:
1. When using timer C input capture mode, adjust the cycle time to (1/timer C count source frequency x 3) or above.
2. When using timer C input capture mode, adjust the pulse width to (1/timer C count source frequency x 1.5) or above.
Figure 5.10 TCIN Input, INT3 Input Timing Diagram when VCC = 5 V
Table 5.16 XIN
Input
Symbol Parameter
Standard
Unit
Min. Max.
t
c(XIN) XIN input cycle time 50 − ns
t
WH(XIN) XIN input “H” width 25 − ns
t
WL(XIN) XIN input “L” width 25 − ns
Table 5.17 CNTR0 Input, CNTR1 Input, INT1 Input
Symbol Parameter
Standard
Unit
Min. Max.
t
c(CNTR0) CNTR0 input cycle time 100 − ns
t
WH(CNTR0) CNTR0 input “H” width 40 − ns
t
WL(CNTR0) CNTR0 input “L” width 40 − ns
Table 5.18 TCIN Input, INT3 Input
Symbol Parameter
Standard
Unit
Min. Max.
t
c(TCIN) TCIN input cycle time
400
(1)
− ns
t
WH(TCIN) TCIN input “H” width
200
(2)
− ns
t
WL(TCIN) TCIN input “L” width
200
(2)
− ns
tWH(XIN)
tc(XIN)
tWL(XIN)
XIN input
VCC = 5 V
tWH(CNTR0)
tc(CNTR0)
tWL(CNTR0)
CNTR0 input
VCC = 5 V
tWH(TCIN)
tc(TCIN)
tWL(TCIN)
TCIN input
VCC = 5 V
