Hitachi SH7032 - AC Characteristics; Clock Cycle Time; Clock High Pulse Width; Clock Low Pulse Width

522
20.2.3 AC Characteristics
The following AC timing chart represents the AC characteristics, not signal functions. For signal
functions, see the explanation in the text.
(1) Clock Timing
Table 20.18 Clock Timing
Conditions: V
CC
= 3.3 V ±0.3V, AV
CC
= 3.3 V ±0.3V, AV
CC
= V
CC
±0.3V, AV
ref
= 3.0 V to
AV
CC
, V
SS
= AV
SS
= 0 V, Ta = –20 to +75°C
*
Note: * Regular-specification products; for wide-temperature-range products, Ta = –40 to +85°C
12.5 MHz 20 MHz
Item Symbol Min Max Min Max Unit Figures
EXTAL input high level
pulse width
t
EXH
22 — 15 — ns 20.45
EXTAL input low level
pulse width
t
EXL
22 — 15 — ns
EXTAL input rise time t
EXr
—10 —5 ns
EXTAL input fall time t
EXf
—10 —5 ns
Clock cycle time t
cyc
80 500 50 250 ns 20.45, 20.46
Clock high pulse width t
CH
30 — 20 — ns 20.46
Clock low pulse width t
CL
30 — 20 — ns
Clock rise time t
Cr
—10 —5 ns
Clock fall time t
Cf
—10 —5 ns
Reset oscillation settling
time
t
OSC1
10 — 10 — ms 20.47
Software standby
oscillation settling time
t
OSC2
10 — 10 — ms