參數(shù)資料
型號: MB90W214B
廠商: Fujitsu Limited
英文描述: 8-Bit Proprietary Microcontroller(8位專用微控制器)
中文描述: 8位微控制器專利(8位專用微控制器)
文件頁數(shù): 54/99頁
文件大小: 932K
代理商: MB90W214B
MB90210 Series
54
11.Write-inhibit RAM
The write-inhibit RAM is write-protectable with the WI pin input. Maintaining the “L” level input to the WI pin
prevents a certain area of RAM from being written. The WI pin has a 4-machine-cycle filter.
(1) Register Configuration
(2) Write-inhibit RAM Area
Write-inhibit RAM area
001100
H
to 0011FF
H
(MB90214/P214A/P214B/W214A/W214B)
001100
H
to 0012FF
H
(MB90V210)
(3) Block Diagram
WI control register (WICR)
00008E
H
Address:
WI control register
7
6
5
4
3
2
1
0
Bit
WI
WICR
(—)
(—)
(—)
(—)
(—)
(—)
(R/W)
(1)
(—)
(—)
(—)
(—)
(—)
(—)
(—)
(—)
Read/write
Initial value
W I
4-machine-cycle
skew removal
4-machine-cycle
skew removal
S Q
R
Access to other area
F
2
MC-16 bus
S
Q
Preceded
R
Write-inhibit
circuit
Select
RAM
decoder
Write-
inhibit
RAM
WR
L
H
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