Hitachi SH7709S, Руководство по оборудованию

Страница: 687 / 788

668
23.3.1 Clock Timing
Table 23.5 Clock Timing (1)
(VccQ = 3.3 ± 0.3 V, VccQ = 1.55 to 2.15 V, AVcc = 3.3 ± 0.3 V, Ta = –20 to
75°C, Maximum External Bus Operating Frequency: 25 MHz)
Item Symbol Min Max Unit Figure
EXTAL clock input frequency f
EX
6.25 25 MHz 23.1
EXTAL clock input cycle time t
EXcyc
40 160 ns
EXTAL clock input low pulse width t
EXL
8 — ns
EXTAL clock input high pulse width t
EXH
8 — ns
EXTAL clock input rise time t
EXR
— 4 ns
EXTAL clock input fall time t
EXF
— 4 ns
CKIO clock input frequency f
CKI
25 25 MHz 23.2
CKIO clock input cycle time t
CKIcyc
40 40 ns
CKIO clock input low pulse width t
CKIL
8 — ns
CKIO clock input high pulse width t
CKIH
8 — ns
CKIO clock input rise time t
CKIR
— 4 ns
CKIO clock input fall time t
CKIF
— 4 ns
CKIO clock output frequency f
OP
25 25 MHz 23.3
CKIO clock output cycle time t
cyc
40 40 ns
CKIO clock output low pulse width t
CKOL
10.6 — ns
CKIO clock output high pulse width t
CKOH
10.6 — ns
CKIO clock output rise time t
CKOR
— 7 ns
CKIO clock output fall time t
CKOF
— 7 ns
CKIO2 clock output delay time t
CK2D
–3 3 ns
CKIO2 clock output rise time t
CK20R
— 7 ns
CKIO2 clock output fall time t
CK20F
— 7 ns
Power-on oscillation settling time t
OSC1
10 — ms 23.4
RESETP
setup time t
RESPS
20 — ns 23.4, 23.5
RESETM
setup time t
RESMS
6 — ns
RESETP
assert time t
RESPW
20 — t
cyc
RESETM
assert time t
RESMW
20 — t
cyc
Standby return oscillation settling time 1 t
OSC2
10 — ms 23.5
Standby return oscillation settling time 2 t
OSC3
10 — ms 23.6
Standby return oscillation settling time 3 t
OSC4
11 — ms 23.7