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VR4102 Datasheet(PDF) 239 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) 239 Page - NEC

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CHAPTER 10 BCU (BUS CONTROL UNIT)
239
10.2.3 BCUSPEEDREG (0x0B00 000A)
(1/2)
Bit
D15
D14
D13
D12
D11
D10
D9
D8
Name
Reserved
Reserved
WPROM[1]
WPROM[0]
Reserved
WLCD/M[2]
WLCD/M[1]
WLCD/M[0]
R/W
R
R
R/W
R/W
R
R/W
R/W
R/W
RTCRST
0
0
0
0
0
0
0
0
Other resets
0
0
0
0
0
0
0
0
Bit
D7
D6D5
D4D3D2
D1
D0
Name
Reserved
WISAA [2]
WISAA [1]
WISAA [0]
Reserved
WROMA[2]
WROMA[1]
WROMA[0]
R/W
R
R/W
R/W
R/W
R
R/W
R/W
R/W
RTCRST
0
0
0
0
0
0
0
0
Other resets
0
0
0
0
0
0
0
0
Bit
Name
Function
D[15..14]
Reserved
Write 0 when writing. 0 is returned after a read.
D[13..12]
WPROM[1..0]
Page ROM access speed
11 : RFU
10 : 1TClock
01 : 2TClock
00 : 3TClock
D[11]
Reserved
Write 0 when writing. 0 is returned after a read.
D[10..8]
WLCD/M[2..0]
Access speed to physical address space from 0x0A00 0000 to 0x0AFF FFFF
LCD(ISAM/LCD=0)
ISA-MEM(ISAM/LCD=1)
111 : RFU
1TClock
110 : RFU
2TClock
101 : RFU
3TClock
100 : RFU
4TClock
011 : 2TClock
5TClock
010 : 4TClock
6TClock
001 : 6TClock
7TClock
000 : 8TClock
8TClock
D[7]
Reserved
Write 0 when writing. 0 is returned after a read.



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