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VR4102 Datasheet(PDF) 256 Page - NEC

Part # VR4102
Description  64/32-bit Microprocessor
PDF  701 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

VR4102 Datasheet(HTML) 256 Page - NEC

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CHAPTER 10 BCU (BUS CONTROL UNIT)
256
10.5.2 System Bus Access
(1) Bus Operations in System Bus
WISAA[2:0] (BCUSPEEDREG [6:4]) can be used to set the access time.
Table 10-10. System Bus Access Times
WISAA [2:0]
Tisa (TClock)
000
8
001
7
010
6
011
5
100
4
101
3
110
RFU
111
RFU
Figure 10-6. 1-byte Access to Even Address Using 16-bit Bus (WISAA[2:0] = 101)
SHB#
Tisa
ADD[25:0]
TClock(Internal)
ZWS#
IOR#/IOW#
MEMR#/MEMW#
IOCHRDY
Tisa
Tisa
DATA[15:0](Write)
DATA[15:0](Read)
IOCS16#
MEMCS16#
H
Remark
The dotted lines indicate high impedance.



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