HD6475328-CP10 Datasheet, PDF (332/459 Pages) Hitachi Semiconductor – original Hitachi CMOS microcomputer unit (MCU)

Table 20-4 Bus Timing (cont)
6MHz
8MHz
10MHz
Measurement
Item
Symbol Min Max Min Max Min Max Unit Conditions
Address setup time 2
tAS2
105 –
80 –
65 –
ns See figure 20-4
Read data setup time
tRDS
60 –
50 – 40 – ns
Read data hold time
tRDH
0
–
0 – 0 – ns
Read data access time
tACC
–
280 – 190 – 160 ns
Write data delay time
tWDD –
70 – 65 – 65 ns
Write data setup time
tWDS 30 –
15 – 10 – ns
Write data hold time
tWDH 30 –
25 – 20 – ns
Wait setup time
tWTS 40 –
40 –
40 –
ns See figure 20-5
Wait hold time
tWTH 10 –
10 – 10 – ns
Bus request setup time
tBRQS 40 –
40 – 40 – ns See figure 20-10
Bus acknowledge delay time 1 tBACD1 –
70 –
60 – 55 ns
Bus acknowledge delay time 2 tBACD2 –
70 –
60 – 55 ns
Bus floating delay time
tBZD
–
tBACD1 –
tBACD1 – tBACD1 ns
E clock delay time
tED
– 20 – 15 – 15 ns See figure 20-
11
E clock rise time
tEr
– 15 – 15 – 15 ns
E clock fall time
tEf
– 15 – 15 – 15 ns
Read data hold time
tRDHE 0
–
0 – 0 – ns See figure 20-6
(E clock sync)
Write data hold time
tWDHE 50 –
40 – 30 – ns
(E clock sync)
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