R8C/33T Group 5. Electrical Characteristics
R01DS0046EJ0110 Rev.1.10 Page 38 of 47
Apr 26, 2011
i = 0 to 2
Figure 5.6 Serial Interface Timing Diagram when Vcc = 5 V
Notes:
1. When selecting the digital filter by the INTi
input filter select bit, use an INTi input HIGH width of either (1/digital filter clock
frequency × 3) or the minimum value of standard, whichever is greater.
2. When selecting the digital filter by the INTi
input filter select bit, use an INTi input LOW width of either (1/digital filter clock
frequency × 3) or the minimum value of standard, whichever is greater.
Figure 5.7 Input Timing for External Interrupt INTi and Key Input Interrupt KIi when Vcc = 5 V
Table 5.17 Serial Interface
Symbol Parameter
Standard
Unit
Min. Max.
t
c(CK) CLKi input cycle time 200 — ns
t
W(CKH) CLKi input “H” width 100 — ns
t
W(CKL) CLKi 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 5.18 External Interrupt INTi (i = 0 to 3) Input, Key Input Interrupt KIi (i = 0 to 3)
Symbol Parameter
Standard
Unit
Min. Max.
t
W(INH)
INTi input “H” width, KIi input “H” width
250
(1)
—ns
t
W(INL)
INTi input “L” width, KIi input “L” width
250
(2)
—ns
Vcc = 5 V
CLKi
TXDi
RXDi
th(C-D)
tC(CK)
tW(CKH)
tW(CKL)
td(C-Q) tsu(D-C)
th(C-Q)
i = 0 to 2
INTi input
(i = 0 to 3)
KIi input
(i = 0 to 3)
Vcc = 5 V
tW(INL)
tW(INH)
