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): 43/49頁
文件大?。?/td> 328K
代理商: GMS34140T
4 - 12
Write / Read data conversion
- You must change MSB ~ LSB
ê
LSB ~ MSB.
- Example
Hex
Binary (MSB~LSB)
2C
E4
8D
0010 1100
1110 0100
1000 1101
Write
Read
Hex
Binary (MSB~LSB)
34
27
B1
0011 0100
0010 0111
1011 0001
File / buffer data
Device (D3 ~ D0)
Checksum
- It is calculated from the Buffer of the programmer.
- Address range is the same as device address.
- Calculate mathod is the same as normal EPROM devices (ex:27C128, 256 etc)
Programming control
- OSC1 & RESETB control OTP device, so you must count OSC1 clocks in every state.
- K ports control the internal state of the OTP device(ex: Read, Write...).
- D5~D0 ports are NMOS open drain I/O in EPROM mode.
It must be pulled up by resistors (about 4.7~ 47K ohm).
- The frequency rate of the OSC1 clock is 10KHz ~ 500KHz.
You can hold OSC1 HIGH or LOW state when you need.
Item
Range
VCC
0 ~ 6.0V
0.25V
Programming DC specification
RESETB
0 ~ 12.5V
0.5V
K-port
D-port
0 ~ 0.2VCC(Low)
0.8VCC ~ VCC (High)
Chapter 4. EPROM
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