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16-Bit, 2-State Access Space:
Figures 6.7 to 6.9 show bus timings for a 16-bit, 2-state access space. When a 16-bit access space
is accessed, the upper half (D15 to D8) of the data bus is used for even addresses, and the lower
half (D7 to D0) for odd addresses. Wait states cannot be inserted.
Bus cycle
T
1
T
2
Address bus
D15 to D8
Valid
D7 to D0
Invalid
Read
D15 to D8
Valid
D7 to D0
Write
High
Note:
n = 1 to 3
Undefined
Figure 6.7 Bus Timing for 16-Bit, 2-State Access Space (Even Byte Access)
Содержание H8S/2437
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