Datasheet

R01DS0011EJ0101 Rev.1.01 Page 75 of 102
Oct 28, 2011
R8C/LA3A Group, R8C/LA5A Group, R8C/LA6A Group, R8C/LA8A Group 5. Electrical Characteristics
Figure 5.10 Input and Output Timing of Serial Interface
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 of External Interrupt INTi and Key Input Interrupt KIi
Table 5.28 Timing Requirements of Serial Interface
(V
SS = 0 V and Topr = −20 to 85 °C (N version)/ −40 to 85 °C (D version), unless
otherwise specified.)
Symbol Parameter
Standard
UnitVCC = 2.2V, Topr = 25°CVCC = 3V, Topr = 25°CVCC = 5V, Topr = 25°C
Min. Max. Min. Max. Min. Max.
t
c(CK) CLK0 input cycle time 800 – 300 – 200 – ns
t
W(CKH) CLK0 input “H” width 400 – 150 – 100 – ns
t
W(CKL) CLK0 input “L” width 400 – 150 – 100 – ns
t
d(C-Q) TXD0 output delay time – 200 – 80 – 50 ns
t
h(C-Q) TXD0 hold time 0–0–0–ns
t
su(D-C) RXD0 input setup time 150 – 70 – 50 – ns
t
h(C-D) RXD0 input hold time 90 – 90 – 90 – ns
Table 5.29 Timing Requirements of External Interrupt INTi (i = 0 to 3, 5, 7) and Key Input Interrupt
KIi
(i = 0 to 7)
(V
SS = 0 V and Topr = −20 to 85 °C (N version)/ −40 to 85 °C (D version), unless
otherwise specified.)
Symbol Parameter
Standard
UnitVCC = 2.2V, Topr = 25°CVCC = 3V, Topr = 25°CVCC = 5V, Topr = 25°C
Min. Max. Min. Max. Min. Max.
t
W(INH) INTi input “H” width, KIi input “H” width
1000
(1)
–
380
(1)
–
250
(1)
–ns
t
W(INL) INTi input “L” width, KIi input “L” width
1000
(2)
–
380
(2)
–
250
(2)
–ns
tW(CKH)
tC(CK)
tW(CKL)
th(C-Q)
th(C-D)
tsu(D-C)td(C-Q)
CLK0
TXD0
RXD0
INTi input
(i = 0 to 3, 5, 7)
tW(INL)
tW(INH)
KIi input
(i = 0 to 7)