AT89C5131A-L Atmel Corporation, AT89C5131A-L Datasheet - Page 33
AT89C5131A-L
Manufacturer Part Number
AT89C5131A-L
Description
Manufacturer
Atmel Corporation
Datasheets
1.AT89C5130A-M.pdf
(34 pages)
2.AT89C5131A-L.pdf
(4 pages)
3.AT89C5131A-L.pdf
(186 pages)
Specifications of AT89C5131A-L
Flash (kbytes)
32 Kbytes
Max. Operating Frequency
48 MHz
Cpu
8051-12C
Max I/o Pins
34
Usb Transceiver
1
Usb Speed
Full Speed
Usb Interface
Device
Spi
1
Twi (i2c)
1
Uart
1
Sram (kbytes)
1.25
Eeprom (bytes)
1024
Self Program Memory
API
Operating Voltage (vcc)
3.0 to 3.6
Timers
4
Isp
UART/USB
Watchdog
Yes
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Hardware Security
4338F–USB–08/07
The following procedure is used to program the Hardware Security space and is sum-
marized in Figure 19:
•
•
•
•
•
•
•
Figure 19. Hardware Programming Procedure
Set FPS and map Hardware byte (FCON = 0x0C)
Disable the interrupts.
Load DPTR at address 0000h.
Load Accumulator register with the data to load.
Execute the MOVX @DPTR, A instruction.
Launch the programming by writing the data sequence 54h followed by A4h in
FCON register.
The end of the programming indicated by the FBusy flag cleared.
Enable the interrupts.
Exec: MOVX @DPTR, A
Launch Programming
End Programming
Programming
Flash Spaces
FCON = A4h
FCON = 54h
Erase Mode
FCON = 00h
FCON = 0Ch
DPTR = 00h
ACC = Data
Cleared?
Data Load
Disable IT
Enable IT
FBusy
EA = 0
EA = 1
33
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