Datasheet

R8C/32C Group 5. Electrical Characteristics
R01DS0009EJ0100 Rev 1.00 Page 43 of 52
Aug. 24, 2010
i = 0, 2
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 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 5.11 Input Timing Diagram for External Interrupt INTi and Key Input Interrupt KIi when Vcc
= 5 V
Table 5.20 Serial Interface
Symbol Parameter
Standard
Unit
Min. Max.
tc(CK) CLKi input cycle time 200 − ns
tW(CKH) CLKi input “H” width 100 − ns
tW(CKL) CLKi input “L” width 100 − ns
td(C-Q) TXDi output delay time − 50 ns
th(C-Q) TXDi hold time 0 − ns
tsu(D-C) RXDi input setup time 50 − ns
th(C-D) RXDi input hold time 90 − ns
Table 5.21 External Interrupt INTi (i = 0, 1, 3) Input, Key Input Interrupt KIi (i = 0 to 3)
Symbol Parameter
Standard
Unit
Min. Max.
tW(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
tW(CKH)
tC(CK)
tW(CKL)
th(C-Q)
th(C-D)
tsu(D-C)td(C-Q)
CLKi
TXDi
RXDi
i = 0, 2
VCC = 5 V
INTi input
(i = 0, 1, 3)
tW(INL)
tW(INH)
VCC = 5 V
KIi input
(i = 0 to 3)