AT89C5131A-L Atmel Corporation, AT89C5131A-L Datasheet - Page 3

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

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

ISP Communication
Management
User Call Management Several Application Program Interface (API) calls are available to the application program to
Flash Memory
Management
Bootloader Configuration
Configuration and
Manufacturer
Information
4287E–USB–04/08
The purpose of this process is to manage the communication and its protocol between the on-
chip bootloader and an external device (host). The on-chip bootloader implements a USB proto-
col (see section “Protocol”). This process translates serial communication frames (USB) into
Flash memory accesses (read, write, erase...).
selectively erase and program Flash pages. All calls are made through a common interface (API
calls) included in the bootloader. The purpose of this process is to translate the application
request into internal Flash memory operations.
This process manages low level access to the Flash memory (performs read and write access).
The table below lists Configuration and Manufacturer byte information used by the bootloader.
This information can be accessed through a set of API or ISP commands.
Mnemonic
BSB
SBV
SSB
EB
P1_CF
P3_CF
P4_CF
Manufacturer
Id1: Family code
Id2: Product Name
Id3: Product Revision
Description
Boot Status Byte
Software Boot Vector
Software Security Byte
Extra Byte
Port 1 Configuration
Port 3 Configuration
Port 4 Configuration
AT89C5131A USB Bootloader
Default Value
FFh
FCh
FFh
FFh
FEh
FFh
FFh
D7h
DFh
58h
F7h
3