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)
Summary of Contents for MuPD70F3187
Page 6: ...6 Preface User s Manual U16580EE3V1UD00 ...
Page 16: ...16 User s Manual U16580EE3V1UD00 ...
Page 28: ...28 User s Manual U16580EE3V1UD00 ...
Page 32: ...32 User s Manual U16580EE3V1UD00 ...
Page 84: ...84 Chapter 2 Pin Functions User s Manual U16580EE3V1UD00 MEMO ...
Page 144: ...144 Chapter 3 CPU Functions User s Manual U16580EE3V1UD00 MEMO ...
Page 312: ...312 Chapter 9 16 Bit Timer Event Counter P User s Manual U16580EE3V1UD00 MEMO ...
Page 534: ...534 Chapter 11 16 bit Timer Event Counter T User s Manual U16580EE3V1UD00 ...
Page 969: ...969 Chapter 20 Port Functions User s Manual U16580EE3V1UD00 MEMO ...
Page 970: ...970 Chapter 20 Port Functions User s Manual U16580EE3V1UD00 ...
Page 976: ...976 Chapter 22 Internal RAM Parity Check Function User s Manual U16580EE3V1UD00 MEMO ...
Page 984: ...984 Chapter 23 On Chip Debug Function OCD User s Manual U16580EE3V1UD00 MEMO ...
Page 1006: ...1006 Chapter 24 Flash Memory User s Manual U16580EE3V1UD00 MEMO ...
Page 1036: ...1036 Chapter 27 Recommended Soldering Conditions User s Manual U16580EE3V1UD00 MEMO ...
Page 1046: ...1046 Appendix A Index User s Manual U16580EE3V1UD00 MEMO ...
Page 1052: ...1052 User s Manual U16580EE3V1UD00 ...
Page 1053: ......