Hitachi H8/3044, Руководство по оборудованию

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Table 21-4 Bus Timing (cont)
Condition A: V
CC
= 2.7 V to 5.5 V, AV
CC
= 2.7 V to 5.5 V, V
REF
= 2.7 V to AV
CC
,
V
SS
= AV
SS
= 0 V, ø = 1 MHz to 8 MHz, T
a
= –20°C to +75°C (regular
specifications), T
a
= –40°C to +85°C (wide-range specifications)
Condition B: V
CC
= 3.15 V to 5.5 V, AV
CC
= 3.15 V to 5.5 V, V
REF
= 3.15 V to AV
CC
,
V
SS
= AV
SS
= 0 V, ø = 1 MHz to 13 MHz, T
a
= –20°C to +75°C (regular
specifications), T
a
= –40°C to +85°C (wide-range specifications)
Condition C: V
CC
= 5.0 V ± 10%, AV
CC
= 5.0 V ± 10%, V
REF
= 4.5 V to AV
CC
,
V
SS
= AV
SS
= 0 V, ø = 1 MHz to 18 MHz, T
a
= –20°C to +75°C (regular
specifications), T
a
= –40°C to +85°C (wide-range specifications)
Condition A Condition B Condition C
8 MHz 13 MHz 16 MHz 18 MHz
Item Symbol Min Max Min Max Min Max Min Max Unit
Write data delay time t
WDD
— 75 — 75 — 60 — 55 ns
Write data setup time 1 t
WDS1
60 — 20 — 15 — 10 —
Write data setup time 2 t
WDS2
5 — –10 — –5 — –10 —
Write data hold time t
WDH
25 — 15 — 20 — 20 —
Read data access t
ACC1
*
— 120 — 60 — 60 — 50
time 1
Read data access t
ACC2
*
— 240 — 140 — 120 — 105
time 2
Read data access t
ACC3
*
— 70 — 30 — 30 — 20
time 3
Read data access t
ACC4
*
— 180 — 100 — 95 — 80
time 4
Precharge time t
PCH
*
85 — 55 — 45 — 40 —
Wait setup time t
WTS
40 — 40 — 25 — 25 — ns Figure 21-9
Wait hold time t
WTH
10 — 10 — 5 — 5 —
Bus request setup ime t
BRQS
40 — 40 — 40 — 40 — ns Figure 21-21
Bus acknowledge t
BACD1
— 60 — 50 — 30 — 30
delay time 1
Bus acknowledge t
BACD2
— 60 — 50 — 30 — 30
delay time 2
Bus-floating time t
BZD
— 70 — 70 — 40 — 40
Note is on next page.
Test
Conditions
Figure 21-7,
Figure 21-8
665
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