Manual

52
AT89C5131
4136A–USB–03/03
Registers
Reset Value = XXXX XX00b
Not bit addressable
Table 42. EECON (S:0D2h)
EECON Register
76543210
EEPL3 EEPL2 EEPL1 EEPL0 - - EEE EEBUSY
Bit Number
Bit
Mnemonic Description
7-4 EEPL3-0
Programming Launch command bits
Write 5Xh followed by AXh to EEPL to launch the programming.
3-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
2-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
1EEE
Enable EEPROM Space bit
Set to map the EEPROM space during MOVX instructions (Write in the column
latches)
Clear to map the XRAM space during MOVX.
0EEBUSY
Programming Busy flag
Set by hardware when programming is in progress.
Cleared by hardware when programming is done.
Cannot be set or cleared by software.