151
Chapter 4
Bus Control Function (
μ
PD70F3187 only)
User’s Manual U16580EE3V1UD00
4.5 Bus
Access
4.5.1 Number of access clocks
The number of basic clocks necessary for accessing each resource is as follows.
Notes: 1.
The instruction fetch becomes 2 clocks, in case of contention with data access.
2.
This is the minimum value.
Table 4-1:
Number of Bus Access Clocks
Resources (Bus width)
Internal RAM
(32 bits)
Peripheral I/O
(16 bits)
External memory
(16 bits)
Bus Cycle Configuration
Instruction fetch
Normal access
1
Note 1
-
2
Note 2
Branch
1
-
2
Note 2
Operand data access
1
3
Note 2
2
Note 2
Содержание MuPD70F3187
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Страница 312: ...312 Chapter 9 16 Bit Timer Event Counter P User s Manual U16580EE3V1UD00 MEMO ...
Страница 534: ...534 Chapter 11 16 bit Timer Event Counter T User s Manual U16580EE3V1UD00 ...
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