AT89C5131A-M Atmel Corporation, AT89C5131A-M Datasheet - Page 34

• Manufacturer Part Number: AT89C5131A-M
• Manufacturer: Atmel Corporation

Specifications of AT89C5131A-M

• 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): 2.7 to 5.5
• Timers: 4
• Isp: UART/USB
• Watchdog: Yes

8.3.6
8.3.6.1
8.3.6.2
34
AT89C5130A/31A-M
Programming the Flash Spaces
User
Extra Row
Figure 8-5.
The following procedure is used to program the User space and is summarized in Figure 8-6:
Note:
The following procedure is used to program the Extra Row space and is summarized in Figure 8-
6:
• Load data in the column latches from address 0000h to 7FFFh
• Disable the interrupts.
• Launch the programming by writing the data sequence 50h followed by A0h in FCON
• Enable the interrupts.
• Load data in the column latches from address FF80h to FFFFh.
• Disable the interrupts.
• Launch the programming by writing the data sequence 52h followed by A2h in FCON
• Enable the interrupts.
register.
The end of the programming indicated by the FBUSY flag cleared.
register.
The end of the programming indicated by the FBUSY flag cleared.
1. The last page address used when loading the column latch is the one used to select the page
programming address.
Column Latches Loading Procedure
Column Latches Mapping
Exec: MOVX @DPTR, A
Data memory Mapping
Column Latches
DPTR = Address
ACC = Data
Data Load
Last Byte
Loading
to load?
FPS = 1
FPS = 0
(1)
.
4337K–USB–04/08