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Bus cycle
T1
Unchanged
Address bus
,
Data bus
High
High
High
High-impedance state
Figure 6.5 Pin States during On-Chip Memory Access
6.5.2
On-Chip Peripheral Module Access Timing
The on-chip peripheral modules are accessed in two states except on-chip USB. The data bus is
either 8 bits or 16 bits wide, depending on the particular internal I/O register being accessed.
Figure 6.6 shows the access timing for the on-chip peripheral modules. Figure 6.7 shows the pin
states.
T1
T2
φ
Internal address bus
Bus cycle
Address
Read data
Write data
Internal read signal
Internal data bus
Internal write signal
Internal data bus
Read
access
Write
access
Figure 6.6 On-Chip Peripheral Module Access Cycle
Summary of Contents for H8S/2215 Series
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