R8C/12 Group 5. Electrical Characteristics
Rev.1.20 Jan 27, 2006 page 23 of 25
REJ03B0068-0120
Timing requirements (Unless otherwise noted: VCC = 3V, VSS = 0V at Topr = 25 °C) [VCC=3V]
Table 5.16 X
IN
input
________
Table 5.17 CNTR0 input, CNTR1 input, INT2 input
________
Table 5.18 TCIN input, INT3 input
Table 5.19 Serial Interface
________
Table 5.20
External interrupt INT0 input
Symbol
t
C(XIN)
tWH(XIN)
t
WL(XIN)
Parameter
XIN input cycle time
XIN input HIGH pulse width
XIN input LOW pulse width
Min.
100
40
40
Max.
–
–
–
Unit
ns
ns
ns
Standard
Symbol
tC(CNTR0)
tWH(CNTR0)
tWL(CNTR0)
Parameter
CNTR0 input cycle time
CNTR0 input HIGH pulse width
CNTR0 input LOW pulse width
Min.
300
120
120
Max.
–
–
–
Unit
ns
ns
ns
Standard
Symbol
tC(TCIN)
tWH(TCIN)
tWL(TCIN)
Parameter
TCIN input cycle time
TCIN input HIGH pulse width
TCIN input LOW pulse width
Min.
1200
(1)
600
(2)
600
(2)
Max.
–
–
–
Unit
ns
ns
ns
Standard
NOTES:
________ ________
1. When selecting the digital filter by the INT0 input filter select bit, use the INT0 input HIGH pulse 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 INT0 input filter select bit, use the INT0 input LOW pusle width
to the greater value,either ( 1/ digital filter clock frequency x 3) or the minimum value of standard.
Max.
–
–
–
–
–
–
Unit
ns
ns
ns
ns
ns
ns
ns
Standard
160
Max.
–
–
Unit
ns
ns
Standard
Symbol
tC(CK)
tW(CKH)
tW(CKL)
td(C-Q)
th(C-Q)
tsu(D-C)
th(C-D)
Parameter
CLKi input cycle time
CLKi input HIGH pulse width
CLKi input LOW pulse width
TxDi output delay time
TxDi hold time
RxDi input setup time
RxDi input hold time
Min.
300
150
150
–
0
55
90
Symbol
tW(INH)
tW(INL)
Parameter
________
INT0 input HIGH pulse width
________
INT0 input LOW pulse width
Min.
380
(1)
380
(2)
NOTES:
1. When using the Timer C capture function, adjust the cycle time above ( 1/ Timer C count source
frequency x 3).
2. When using the Timer C capture function, adjust the pulse width above ( 1/ Timer C count source
frequency x 1.5).
