Fujitsu FR60 Hardware Manual page 209

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Figure 4.4-5 shows the relationship between the internal register and external data bus based on the data
format of byte access (when the LDUB and STB instructions are executed).
Figure 4.4-5 Byte Access (When LDUB and STB Instructions Executed)
a) Output address
low-order digits "00"
Internal
External
register
bus
D31
D31
AA
D23
D23
D15
D15
D7
D7
AA
D0
D0
b) Output address
low-order digits "01"
Internal
External
register
bus
D31
D31
D23
D23
AA
D15
D15
D7
D7
AA
D0
D0
c) Output address
low-order digits "10"
Internal
External
register
bus
D31
D31
D23
D23
D15
D15
AA
D7
D7
AA
D0
D0
d) Output address
low-order digits "11"
Internal
External
register
bus
D31
D31
D23
D23
D15
D15
D7
D7
AA
AA
D0
D0
191

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