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4.5 Bus Access
4.5.1 Number of access clocks
The number of basic clocks required to access each resource is shown below.
Bus Cycle Status
Resource (Bus Width)
Internal ROM (32 bits)
Internal RAM (32 bits)
On-chip peripheral I/O (16 bits)
Programmable peripheral I/O
External memory (16 bits)
Notes 1.
This value is 2 in the case of instruction branch
2.
This value is 2 if there is contention with data access.
3.
MIN. value
Remark Unit: Clock/access
116
CHAPTER 4 BUS CONTROL FUNCTION
Instruction Fetch
Note 1
1
Note 2
1
−
−
Note 3
3
User's Manual U14492EJ3V0UD
Operand Data Access
5
1
Note 3
5
Note 3
5
Note 3
3
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