參數(shù)資料
型號: MB90P224A
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): 60/105頁
文件大小: 1130K
代理商: MB90P224A
MB90220 Series
60
14. 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 Areas
Write-inhibit RAM areas:
000D00
H
to 000EFF
H
(MB90223)
001300
H
to 0014FF
H
(MB90224/P224A/P224B/W224A/W224B)
001500
H
to 0018FF
H
(MB90V220)
(3) Block Diagram
00008E
H
(—)
(—)
(—)
(R/W)
(—)
(—)
(—)
(—)
WI
bit7
bit6
bit5
bit4
bit3
bit2
bit1
bit0
WICR
- - - X - - - -
Register name Address
Initial value
WI Control Register (WICR)
WI
4-machine cycle smoothing circuit
4-machine cycle smoothing circuit
S
R
Q
Priority
R
Q
Other area access
Write-inhibit
circuit
Write-inhibit
RAM
RAM
decoder
Select
F
2
MC-16 bus
L
H
WR
S
相關(guān)PDF資料
PDF描述
MB90223 8-Bit Proprietary Microcontroller(8位專用微控制器)
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