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| GMS81504 Datasheet, PDF (47/54 Pages) List of Unclassifed Manufacturers – CMOS SINGLE-CHIP 8-BIT MICROCONTROLLER | |||
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GMS81504T PROGRAMMING SPECIFICATION
HYUNDAI MicroElectronics
PIN FUNCTION (OTP Mode)
VPP (Program Voltage)
VPP is the input for the program voltage for program-
ming the EPROM.
CE ( Chip Enable)
CE is the input for programming and verifying inter-
nal EPROM.
OE (Output Enable)
OE is the input of data output control signal for verify.
A0~A11 (Address Bus)
A0~A11 are address input pins for internal EPROM.
O0~O7 (EPROM Data Bus)
These are data bus for internal EPROM.
Pin connection during programming
PROGRAMMING
The GMS81504T has address A0~A11 pins. Therefore, the programmer just program 4K bytes data (address
7000H to 7FFFH) into the GMS81504T OTP device. During the programming, addresses A12~A15 of the
programmer must be pulled to a logic high.
When the programmer write the data from 7000H to 7FFFH, consequently, the data actually will be written into
addresses F000H to FFFFHof the OTP device.
1. The data format to be programmed is made up of Motorola S1 format.
Ex) "Motorola S1" format;
S0080000574154434880
S1247000E1FF3BFF04A13F8F06E101711B821B1BE01D1B3B191BF6181BF01C1BFF081BFF0AB0
S12470211BF5091BFF0B1BFF3F1B003E1B003D1B003C1BFF3B1B003A1BFF391BFF381BFF350D
:
:
S1057FF2983FB2
S1057FFEFF0F6F
S9030000FC
2. Down load above data into programmer from PC.
3. Programming the data from address 7000H to 7FFFH into OTP MCU, the data must be turned over respectively,
and then record the data.When read the data, it also must be turned over.
Ex) 00(00000000)âFF(11111111), 76(01110110)â89(10001001), FF(11111111)â00(00000000) etc.
4. Of course, the check sum is result of the sum of whole data from address 7000H to 7FFFH in the file (not reverse
2
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