Hitachi SH7032 - Watchdog Timer Timing

511
t
PRS
CK
t
PWD
Ports A–C
(Read)
Ports A–C
(Write)
T
1
T
2
T
3
t
PRH
Figure 20.38 Programmable Timing Pattern Controller Output Timing
(7) Watchdog Timer Timing
Table 20.11 Watchdog Timer Timing
Case A: V
CC
= 3.0 to 5.5 V, AV
CC
= 3.0 to 5.5 V, AV
CC
= V
CC
±10%, AV
ref
= 3.0 V to AV
CC
,
V
SS
= AV
SS
= 0 V, φ = 12.5 MHz, Ta = –20 to +75°C
*
Case B: V
CC
= 5.0 V ±10%, AV
CC
= 5.0 V ±10%, AV
CC
= V
CC
±10%, AV
ref
= 4.5 V to AV
CC
,
V
SS
= AV
SS
= 0 V, φ = 20 MHz, Ta = –20 to +75°C
*
Note: * Regular-specification products; for wide-temperature-range products, Ta = –40 to +85°C
Cases A and B
Item Symbol Min Max Unit Figure
WDTOVF delay time t
WOVD
— 100 ns 20.39
t
WOVD
CK
t
WOVD
WDTOVF
Figure 20.39 Watchdog Timer Output Timing