175
Chapter 4
Bus Control Function (
μ
PD70F3187 only)
User’s Manual U16580EE3V1UD00
(2)
Address wait control register (AWC)
The V850E/PH2 allows insertion of address setup wait and address hold wait states before and
after the T1 cycle.
The address setup wait and address hold wait states can be set with the AWC register for each CS
area.
This register can be read/written in 16-bit units.
Cautions: 1. The internal ROM area (flash memory) and the internal RAM area are not subject
to programmable waits and ordinarily no wait access is carried out. The internal
peripheral I/O area is also not subject to programmable wait states, with wait
control performed only by each peripheral function.
2. Write to the AWC registers after reset, and then do not change the set values.
Also, do not access an external memory area other than that for this initialization
routine until initial setting of the AWC registers is finished. However, it is possible
to access external memory areas whose initialization has been finished.
Figure 4-9:
Address Wait Control Register (AWC)
Remark:
n = 0 to 7
After reset:
0000H
R/W
Address:
FFFFF488H
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
AWC
AHW7 ASW7 AHW6 ASW6 AHW5 ASW5 AHW4 ASW4 AHW3 ASW3 AHW2 ASW2 AHW1 ASW1 AHW0 ASW0
CS7
CS6
CS5
CS4
CS3
CS2
CS1
CS0
AHWn
Address Hold Wait Insertion During CSn Area Access
0
No Insertion
1
Address hold wait state inserted after T1 bus cycle
ASW1
Address Setup Wait Insertion During CSn Area Access
0
No Insertion
1
Address setup wait state inserted before T1 bus cycle
Содержание V850E/PH2
Страница 6: ...6 Preface User s Manual U16580EE3V1UD00...
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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 PD70F3187 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...
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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...
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