178
Chapter 4
Bus Control Function (
μ
PD70F3187 only)
User’s Manual U16580EE3V1UD00
(2)
Bus clock dividing control register (DVC)
This register can be read/written in 8-bit units.
Reset input changes the value of this register to initial setting 01H.
Cautions: 1. Idle states cannot be inserted in internal ROM, internal RAM, on-chip peripheral
I/O, or programmable peripheral I/O areas.
2. Write to the DVC register after reset, and then do not change the set value. Also,
do not access an external memory area other than that for this initialization
routine until initial setting of the DVC register is finished. However, it is possible
to access external memory areas whose initialization has been finished.
3. Do not change the settings of bits 0 to 6. Otherwise the operation of the external
bus interface cannot be ensured.
Figure 4-11:
Bus Clock Dividing Control Register (DVC)
After reset:
01H
R/W
Address:
FFFFF48EH
7
6
5
4
3
2
1
0
DVC
BCWI
0
0
0
0
0
0
1
BCWI
Idle State Insertion after Write Cycle
0
Idle state not inserted after write access
1
Idle state inserted after write access
Note
Note:
BCWI bit setting is only valid when BCn1 bit of the BCC register, corresponding to
the CSn area for which the write access will be performed, is set to “1”. (n = 0 to 7)
Содержание MuPD70F3187
Страница 6: ...6 Preface User s Manual U16580EE3V1UD00 ...
Страница 16: ...16 User s Manual U16580EE3V1UD00 ...
Страница 28: ...28 User s Manual U16580EE3V1UD00 ...
Страница 32: ...32 User s Manual U16580EE3V1UD00 ...
Страница 84: ...84 Chapter 2 Pin Functions User s Manual U16580EE3V1UD00 MEMO ...
Страница 144: ...144 Chapter 3 CPU Functions User s Manual U16580EE3V1UD00 MEMO ...
Страница 192: ...192 Chapter 5 Memory Access Control Function μPD70F3187 only User s Manual U16580EE3V1UD00 MEMO ...
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 ...
Страница 969: ...969 Chapter 20 Port Functions User s Manual U16580EE3V1UD00 MEMO ...
Страница 970: ...970 Chapter 20 Port Functions User s Manual U16580EE3V1UD00 ...
Страница 976: ...976 Chapter 22 Internal RAM Parity Check Function User s Manual U16580EE3V1UD00 MEMO ...
Страница 984: ...984 Chapter 23 On Chip Debug Function OCD User s Manual U16580EE3V1UD00 MEMO ...
Страница 1006: ...1006 Chapter 24 Flash Memory User s Manual U16580EE3V1UD00 MEMO ...
Страница 1036: ...1036 Chapter 27 Recommended Soldering Conditions User s Manual U16580EE3V1UD00 MEMO ...
Страница 1046: ...1046 Appendix A Index User s Manual U16580EE3V1UD00 MEMO ...
Страница 1052: ...1052 User s Manual U16580EE3V1UD00 ...
Страница 1053: ......