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16-Bit, 3-State Access Space:
Figures 6.10 to 6.12 show bus timings for a 16-bit, 3-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 can 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
T
3
Note:
n = 1 to 3
Undefined
Figure 6.10 Bus Timing for 16-Bit, 3-State Access Space (Even Byte Access)
Summary of Contents for H8S/2437
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