AT89C5131A-L Atmel Corporation, AT89C5131A-L Datasheet - Page 34
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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Reading the Flash Spaces
User
Extra Row
Hardware Security
34
AT89C5131A-L
The following procedure is used to read the User space and is summarized in Figure 20:
•
•
The following procedure is used to read the Extra Row space and is summarized in
Figure 20:
•
•
The following procedure is used to read the Hardware Security space and is summa-
rized in Figure 20:
•
•
Figure 20. Reading Procedure
Map the User space by writing 00h in FCON register.
Read one byte in Accumulator by executing MOVC A, @A+DPTR with A = 0 &
DPTR = 0000h to FFFFh.
Map the Extra Row space by writing 02h in FCON register.
Read one byte in Accumulator by executing MOVC A, @A+DPTR with A = 0 &
DPTR = FF80h to FFFFh.
Map the Hardware Security space by writing 04h in FCON register.
Read the byte in Accumulator by executing MOVC A, @A+DPTR with A = 0 &
DPTR = 0000h.
Exec: MOVC A, @A+DPTR
Flash Spaces Reading
Flash Spaces Mapping
FCON = 00000xx0b
DPTR = Address
Erase Mode
FCON = 00h
Data Read
ACC = 0
4338F–USB–08/07
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