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Chapter 4
Bus Control Function
Preliminary User’s Manual U15839EE1V0UM00
(2)
Address setup wait control register (ASC)
The V850E/CA2 Jupiter allows insertion of address setup wait states before the T1 cycle of the
SRAM or page ROM cycle.
The number of address setup wait states can be set with the ASC register for each CS area.
This register can be read/written in 16-bit units.
Remark:
During address setup wait, the external wait function is disabled by the WAIT pin.
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Address
Initial
value
ASC AC71 AC70 AC61 AC60 AC51 AC50 AC41 AC40 AC31 AC30 AC21 AC20 AC11 AC10 AC01 AC00 FFFFF48AH FFFFH
CS7
CS6
CS5
CS4
CS3
CS2
CS1
CS0
Bit Position
Bit Name
Function
15 to 0
ACn1,
ACn0
(n = 0 to 7)
Address Cycle
Specifies the number of address setup wait states inserted before the T1 cycle of
SRAM/page ROM cycle for each CS area.
ACn1
ACn0
Number of Wait States
0
0
Not inserted
0
1
1
1
0
2
1
1
3
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