NEC UPD703116 User Manual page 115

32-bit single-chip microcontrollers
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(2) Address wait control register (AWC)
In the V850E/IA1, address setup wait and address hold wait states can be inserted before and after the T1
cycle, respectively.
These wait states can be set for each CS space via the AWC register.
This register can be read/written in 16-bit units.
Caution Write to the AWC register after reset, and then do not change the set values.
15
14
13
12
AWC
AHW7
ASW7
AHW6
ASW6
CSn signal
CS7
CS6
Bit position
Bit name
15, 13, 11, 9,
AHWn
7, 5, 3, 1
(n = 0 to 7)
14, 12, 10, 8,
ASWn
6, 4, 2, 0
(n = 0 to 7)
CHAPTER 4 BUS CONTROL FUNCTION
11
10
9
8
7
6
AHW5
ASW5
AHW4
ASW4
AHW3
ASW3
CS5
CS4
CS3
Sets the insertion of an address hold wait state in each CSn space after the T1 cycle.
0: Address hold wait state not inserted
1: Address hold wait state inserted
Sets the insertion of an address setup wait state in each CSn space before the T1 cycle.
0: Address setup wait state not inserted
1: Address setup wait state inserted
User's Manual U14492EJ5V0UD
5
4
3
2
1
0
AHW2
ASW2
AHW1
ASW1
AHW0
ASW0
CS2
CS1
CS0
Function
Address
Initial value
FFFFF488H
0000H
115

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