參數(shù)資料
型號: GMS34140T
廠商: Electronic Theatre Controls, Inc.
英文描述: 4-BIT SINGLE CHIP MICROCOMPUTERS
中文描述: 4位單片機微機
文件頁數(shù): 46/49頁
文件大小: 328K
代理商: GMS34140T
4 - 15
EPROM write mode (3/4)
EPROM write mode (4/4)
RESETB
OSC1
K3 ~ K0
D4 ~ D0
1101
12.5V
D3~D0
D7~D4
Verify
A9~A5
A4~A0
D3~D0
D7~D4
0000
1000
High bit
Instruction
Latch
Low bit
Instruction
Latch
High bit
Address
Latch
Low bit
Address
Latch
High bit
Instruction
Output
Low bit
Instruction
Output
Next Address Input
Next Data Input
VCC
6V
Data
Strobe
point
5Clock
Data
Strobe
point
5Clock
4
2
2
No
Fail
Yes
Pass
No
Fail
Pass
Yes
START
¨
Reset
(Set EPROM write mode)
Address=First address
¨è
Set address & data
¨é
EPROM write
Repeat until near 100uS.
When 4MHz OSC1, repeat 10
times (12uS*10=120uS)
RESETB=0V
VCC=0V
END
Count=0
Count ++
¨ê
Verify
Count=25
Device fail
Address ++
¨é
EPROM write
(Write one more time)
Address > Last address
EPROM read mode
Verify all
RESETB=0V
VCC=0V
Device OK
Chapter 4. EPROM
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