Datasheet

R8C/36C Group 5. Electrical Characteristics
R01DS0018EJ0110 Rev.1.10 Page 47 of 59
Nov 02, 2010
Timing Requirements (Unless Otherwise Specified: VCC = 5 V, VSS = 0 V, Topr = 25 °C)
Figure 5.8 External Clock Input Timing Diagram when VCC = 5 V
Figure 5.9 TRAIO Input Timing Diagram when V
CC = 5 V
Notes:
1. When using timer RF input capture mode, adjust the cycle time to (1/timer RF count source frequency × 3) or above.
2. When using timer RF input capture mode, adjust the pulse width to (1/timer RF count source frequency × 1.5) or above.
Figure 5.10 TRFI Input Timing Diagram when VCC = 5 V
Table 5.19 External Clock Input (XOUT, XCIN)
Symbol Parameter
Standard
Unit
Min. Max.
t
c(XOUT) XOUT input cycle time 50 — ns
t
WH(XOUT) XOUT input “H” width 24 — ns
t
WL(XOUT) XOUT input “L” width 24 — ns
t
c(XCIN) XCIN input cycle time 14 — µs
t
WH(XCIN) XCIN input “H” width 7 — µs
t
WL(XCIN) XCIN input “L” width 7 — µs
Table 5.20 TRAIO Input
Symbol Parameter
Standard
Unit
Min. Max.
t
c(TRAIO) TRAIO input cycle time 100 — ns
t
WH(TRAIO) TRAIO input “H” width 40 — ns
t
WL(TRAIO) TRAIO input “L” width 40 — ns
Table 5.21 TRFI Input
Symbol Parameter
Standard
Unit
Min. Max.
t
c(TRFI) TRFI input cycle time
400
(1)
—ns
t
WH(TRFI) TRFI input “H” width
200
(2)
—ns
t
WL(TRFI) TRFI input “L” width
200
(2)
—ns
External clock input
tWH(XOUT),
tWH(XCIN)
tC(XOUT), tC(XCIN)
tWL(XOUT), tWL(XCIN)
VCC = 5 V
TRAIO input
VCC = 5 V
tC(TRAIO)
tWL(TRAIO)
tWH(TRAIO)
tWH(TRFI)
tc(TRFI)
tWL(TRFI)
TRFI input
VCC = 5 V