Datasheet

R8C/M11A Group, R8C/M12A Group 4. Electrical Characteristics
R01DS0010EJ0200 Rev.2.00 Page 35 of 45
May 31, 2012
Figure 4.6 Serial Interface Timing When Vcc = 5 V
Notes:
1. When the digital filter is enabled by the INTi
input filter select bit, the INTi input high width is (1/digital filter clock frequency × 3)
or the minimum value of the standard, whichever is greater.
2. When the digital filter is enabled by the INTi
input filter select bit, the INTi input low width is (1/digital filter clock frequency × 3)
or the minimum value of the standard, whichever is greater.
Figure 4.7 Timing for External Interrupt INTi Input and Key Input Interrupt KIi When Vcc = 5 V
Table 4.17 Serial Interface
Symbol Parameter
Standard
Unit
Min. Max.
t
c(CK) CLK0 input cycle time 200 — ns
t
W(CKH) CLK0 input high width 100 — ns
t
W(CKL) CLK0 input low width 100 — ns
t
d(C-Q) TXD0 output delay time — 50 ns
t
h(C-Q) TXD0 hold time 0—ns
t
su(D-C) RXD0 input setup time 50 — ns
t
h(C-D) RXD0 input hold time 90 — ns
Table 4.18 External Interrupt INTi Input, Key Input Interrupt KIi (i = 0 to 3)
Symbol Parameter
Standard
Unit
Min. Max.
t
W(INH)
INTi input high width, KIi input high width
250
(1)
—ns
t
W(INL)
INTi input low width, KIi input low width
250
(2)
—ns
Vcc = 5 V
CLK0
tW(CKH)
tC(CK)
tW(CKL)
TXD0
RXD0
tsu(D-C)td(C-Q)
th(C-D)
th(C-Q)
Vcc = 5 V
INTi input
KIi input
(i = 0 to 3)
tW(INL)
tW(INH)