17-1
6000 Series user’s manual
Serial EEPROM
Chapter 17:
Serial EEPROM
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Description
Up to 768 words of user-definable data can be saved in the serial
EEPROM. The serial EEPROM does not require battery backup to
maintain the data when the system power is off. The serial EEPROM is
easily accessible via software interrupts by most programming
languages.
The real time calendar/clock provides the user with 512 bytes of user-
defined CMOS RAM. This RAM requires battery backup to maintain
data. If a battery is not desirable, this data can be stored in serial
EEPROM, written to CMOS RAM on power up, changed and written
back to serial EEPROM.
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Enhanced INT 17H function definitions
This section provides definitions for the following functions: Read
Single Word from Serial EEPROM, Write Single Word to Serial
EEPROM, Read Multiple Words from Serial EEPROM, Write Multiple
Words to Serial EEPROM, and Return Serial EEPROM Size.
Read a single word from the serial EEPROM
Function:
fch
Subfunction:
00h
Purpose:
To read a single word from the on-board serial EEPROM.
Calling registers:
AH fch
AL
00h
BX
Word address (zero based)
DX
ffffh
Return registers:
Carry flag cleared if successful
AX
Word read
Carry flag set if error
AL
Error code
Error Code
Meaning
ffh
Unknown error
01h
Function not implemented
02h
Defective serial EEPROM
03h
Illegal access
Summary of Contents for 6000 Series
Page 7: ...Notice to user PC 500 user s manual ...
Page 9: ...About this manual 6000 Series user s manual ...
Page 37: ...2 20 Quick start 6000 Series user s manual ...
Page 65: ...5 16 Serial ports 6000 Series user s manual ...
Page 87: ...6 22 EZ I O 6000 Series user s manual ...
Page 103: ...8 8 Analog I O 6000 Series user s manual ...
Page 119: ...14 2 PC 104 expansion 6000 Series user s manual ...
Page 133: ...16 4 Watchdog timer reset and remote reset 6000 Series user s manual ...
Page 139: ...17 6 Serial EEPROM 6000 Series user s manual ...
Page 157: ...21 2 Software utilities 6000 Series user s manual ...
Page 161: ...22 4 Troubleshooting 6000 Series user s manual ...
Page 177: ...A 16 6010 technical data 6000 Series user s manual ...
Page 215: ...D 16 6040 technical data 6000 Series user s manual ...
Page 229: ...F 2 Miscellaneous 6000 Series user s manual ...