Datasheet

R8C/32C Group 5. Electrical Characteristics
R01DS0009EJ0100 Rev 1.00 Page 46 of 52
Aug. 24, 2010
Timing requirements
(Unless Otherwise Specified: V
CC = 3 V, VSS = 0 V at Topr = 25°C)
Figure 5.12 External Clock Input Timing Diagram when V
CC = 3 V
Figure 5.13 TRAIO Input Timing Diagram when V
CC = 3 V
Table 5.24 External Clock Input (XOUT, XCIN)
Symbol Parameter
Standard
Unit
Min. Max.
tc(XOUT) XOUT input cycle time 50 − ns
tWH(XOUT) XOUT input “H” width 24 − ns
tWL(XOUT) XOUT input “L” width 24 − ns
tc(XCIN) XCIN input cycle time 14 −µs
tWH(XCIN) XCIN input “H” width 7 −µs
tWL(XCIN) XCIN input “L” width 7 −µs
Table 5.25 TRAIO Input
Symbol Parameter
Standard
Unit
Min. Max.
tc(TRAIO) TRAIO input cycle time 300 − ns
tWH(TRAIO) TRAIO input “H” width 120 − ns
tWL(TRAIO) TRAIO input “L” width 120 − ns
External Clock
input
tWH(XOUT),
tWH(XCIN)
tC(XOUT), tC(XCIN)
tWL(XOUT), tWL(XCIN)
VCC = 3 V
TRAIO input
VCC = 3 V
tC(TRAIO)
tWL(TRAIO)
tWH(TRAIO)