AT89C51ID2-SLSIM Atmel, AT89C51ID2-SLSIM Datasheet - Page 113
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AT89C51ID2-SLSIM
Manufacturer Part Number
AT89C51ID2-SLSIM
Description
C51ID2 64KF TWI 32KHZ PLCC44 3-5.5V IND.
Manufacturer
Atmel
Datasheet
1.AT89C51ID2-SLSIM.pdf
(157 pages)
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Read Data
4289C–8051–11/05
The following procedure is used to read the data stored in the EEPROM memory:
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•
•
•
•
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Figure 44. Recommended EEPROM Data Read Sequence
Check EEBUSY flag
If the user application interrupts routines use XRAM memory space: Save and
disable interrupts.
Load DPTR with the address to read
Set bit EEE of EECON register
Execute a MOVX A, @DPTR
Clear bit EEE of EECON register
Restore interrupts.
Exec: MOVX A, @DPTR
EEPROM Data Mapping
EEPROM Data Mapping
EECON = 00h (EEE = 0
EEPROM Data Read
EECON = 02h (EEE=1)
Save & Disable IT
DPTR= Address
Sequence
ACC= Data
Last Byte
Cleared?
Data Read
to Read?
Restore IT
EEBusy
EA= 0
AT89C51ID2
113
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