R8C/38T-A Group 4. Electrical Characteristics
R01DS0081EJ0100 Rev.1.00 Page 58 of 60
Dec 09, 2011
i = 0 or 1
Note:
1. External pin load condition CL = 30 pF
i = 0 or 1
Figure 4.9 Input and Output Timing of Serial Interface (i = 0 or 1)
Table 4.24 Timing Requirements of Serial Interface
(Internal clock selected as transfer clock (master communication))
Symbol Parameter
Standard
Unit
Vcc = 2.2 V, Topr = 25°C Vcc = 3 V, Topr = 25°C Vcc = 5 V, Topr = 25°C
Min. Max. Min. Max. Min. Max.
t
d(C-Q) TXDi output delay time
― 200 ― 30 ― 10 ns
tsu(D-C)
RXDi input setup time
(1)
150 ― 120 ― 90 ― ns
th(C-D) RXDi input hold time
90 ― 90 ― 90 ― ns
Table 4.25 Timing Requirements of Serial Interface
(External clock selected as transfer clock (slave communication))
Symbol Parameter
Standard
Unit
Vcc = 2.2 V, Topr = 25°C Vcc = 3 V, Topr = 25°C Vcc = 5 V, Topr = 25°C
Min. Max. Min. Max. Min. Max.
t
c(CK) CLKi input cycle time 800 ― 300 ― 200 ― ns
t
W(CKH) CLKi input high width 400 ― 150 ― 100 ― ns
t
W(CKL) CLKi input low width 400 ― 150 ― 100 ― ns
t
d(C-Q) TXDi output delay time ― 200 ― 120 ― 90 ns
t
su(D-C) RXDi input setup time 150 ― 30 ― 10 ― ns
t
h(C-D) RXDi input hold time 90 ― 90 ― 90 ― ns
tW(CKH)
tC(CK)
tW(CKL)
th(C-Q)
th(C-D)
tsu(D-C)td(C-Q)
CLKi
TXDi
RXDi
