HD6432646 Hitachi, HD6432646 Datasheet - Page 107
HD6432646
Manufacturer Part Number
HD6432646
Description
(HD64F264x Series) 16-Bit Microcomputer
Manufacturer
Hitachi
Datasheet
1.HD6432646.pdf
(1155 pages)
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2.9.3
The on-chip supporting modules are accessed in two states. The data bus is either 8 bits or 16 bits
wide, depending on the particular internal I/O register being accessed. Figure 2-19 shows the
access cycle for the on-chip supporting modules. Figure 2-20 shows the pin states.
ø
Internal address bus
Read
access
Write
access
On-Chip Supporting Module Access Timing
Internal read signal
Internal data bus
Internal write signal
Internal data bus
Figure 2-19 On-Chip Supporting Module Access Cycle
T1
Bus cycle
Address
Write data
Read data
T2
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