R8C/20 Group, R8C/21 Group 5. Electrical Characteristics
Rev.2.00 Aug 27, 2008 Page 36 of 41
REJ03B0120-0200
i = 0 or 1
Figure 5.10 Serial Interface Timing Diagram when VCC = 5 V
NOTES:
1. When selecting the digital filter by the INTi
input filter select bit, use the INTi input HIGH width to the greater value, either
(1/digital filter clock frequency x 3) or the minimum value of standard.
2. When selecting the digital filter by the INTi
input filter select bit, use the INTi input LOW width to the greater value, either
(1/digital filter clock frequency x 3) or the minimum value of standard.
Figure 5.11 External Interrupt INTi Input Timing Diagram when VCC = 5 V (i = 0 to 3)
Table 5.18 Serial Interface
Symbol Parameter
Standard
Unit
Min. Max.
t
c(CK) CLK0 input cycle time 200 − ns
t
W(CKH) CLK0 input “H” width 100 − ns
t
W(CKL) CLK0 input “L” width 100 − ns
t
d(C-Q) TXDi output delay time − 50 ns
t
h(C-Q) TXDi hold time 0 − ns
t
su(D-C) RXDi input setup time 50 − ns
t
h(C-D) RXDi input hold time 90 − ns
Table 5.19 External Interrupt INTi (i = 0 to 3) Input
Symbol Parameter
Standard
Unit
Min. Max.
t
W(INH)
INTi input “H” width
250
(1)
− ns
t
W(INL)
INTi input “L” width
250
(2)
− ns
i = 0 or 1
Vcc = 5V
CLK0
TXDi
RXDi
tW(CKH)
tc(CK)
tW(CKL)
th(C-Q)
th(C-D)
tsu(D-C)
td(C-Q)
i = 0 to 3
Vcc = 5V
INTi input
tW(INL)
tW(INH)
