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Bus cycle
T
1
Unchanged
Address bus
AS
RD
HWR
,
LWR
Data bus
ø
High
High
High
High-impedance state
Figure 2-15 Pin States during On-Chip Memory Access
2.9.3
On-Chip Supporting Module Access Timing
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 2-16 shows the access timing for the on-chip supporting modules.
Figure 2-17 shows the pin states.
Bus cycle
T
1
T
2
Address
Read data
Write data
Internal read signal
Internal data bus
Internal write signal
Internal data bus
Read
access
Write
access
Internal address bus
ø
Figure 2-16 On-Chip Supporting Module Access Cycle
Содержание ZTAT H8S/2357F
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