AT89C5130A-M Atmel Corporation, AT89C5130A-M Datasheet - Page 46

• Manufacturer Part Number: AT89C5130A-M
• Manufacturer: Atmel Corporation

Specifications of AT89C5130A-M

• Flash (kbytes): 16 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

11.2
11.2.1
46
Boot Process
[SBV]00h
AT89C5130A/31A-M
Software Boot Process Example
3FFFh
0000h
Flash Memory
16K Bytes
Custom
Bootloader
C5130A
FM0
Figure 11-1. Flash Memory Mapping
Many algorithms can be used for the software boot process. Below are descriptions of the differ-
ent flags and Bytes.
Boot Loader Jump bit (BLJB):
- This bit indicates if on RESET the user wants to jump to this application at address @0000h on
FM0 or execute the boot loader at address @F400h on FM1.
- BLJB = 0 (i.e. bootloader FM1 executed after a reset) is the default Atmel factory programming.
-To read or modify this bit, the APIs are used.
Boot Vector Address (SBV):
- This byte contains the MSB of the user boot loader address in FM0.
- The default value of SBV is FFh (no user boot loader in FM0).
- To read or modify this byte, the APIs are used.
Extra Byte (EB) & Boot Status Byte (BSB):
- These Bytes are reserved for customer use.
- To read or modify these Bytes, the APIs are used.
[SBV]00h
7FFFh
0000h
Flash Memory
32K Bytes
Custom
Bootloader
C5131A
FM0
F400h
FM1 Mapped between F400h and FFFFh
when API Called
3K Bytes IAP
Bootloader
FM1
FFFFh
4337K–USB–04/08