參數(shù)資料
型號(hào): 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(jī)微機(jī)
文件頁數(shù): 35/49頁
文件大小: 328K
代理商: GMS34140T
4 - 4
Chapter 4. EPROM
EPROM read mode (1/2)
AL : Low Address (A4~0) Input Latch
OH : High Data (D7~4) Output
OL : Low Data (D3~0) Output
AH : High Address (A9~5) Input Latch
For device verify or read.
If you set Lock bit, output data is always FF.
* Note : 1. AH, AL, DH, DL Inputs released at 100~200nS after OSC rising edge and
width is 1OSC cycle ( if OSC is 500KHz, width is 2uS ).
RESETB
OSC
12.5V
CK1
CK2
CK3
K3 ~ K0
0110
AH
D4 ~ D0
0000
VCC
6V
0V
AL
OH
OL
1101
AH
AL
OH
OL
AH
AL
OH
OL
AH
AL
OH
OL
0000
1101
0000
1101
0000
1101
Addr. 0
Addr. 1
Addr. 2
Addr. 3
1
2
3
2us at 500KHz
¨ ¨è
¨
¨
14.5clocks
EPROM read mode (2/2)
START
END
¨
Reset
(Set EPROM read mode)
Address=First address
¨è
Set address
¨é
Read data
Address ++
Address > Last address
RESETB=0V
VCC=0V
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