AT89C5131A-L Atmel Corporation, AT89C5131A-L Datasheet - Page 19

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AT89C5131A-L

Manufacturer Part Number
AT89C5131A-L
Description
Manufacturer
Atmel Corporation
Datasheets

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
Figure 7. Example of Firmware Download Zero Length DFU_DNLOAD Request
SETUP
OUT
OUT
OUT
OUT
IN
The Host sends a DFU_DNLOAD request with the wLength field cleared to 0 to the device to
indicate that it has completed transferring the firmware image file. This is the final payload
packet of a download operation.
This operation should be preceded by a Long Jump address specification using the correspond-
ing Flash command.
Answers from
After each program request, the Host can request the device state and status by sending a
Bootloader
DFU_GETSTATUS message.
If the device status indicates an error, the host can send a DFU_CLRSTATUS request to the
device.
4287E–USB–04/08
AT89C5131A USB Bootloader
DFU_DNLOAD
Prog_Start + (EP0 fifo length - 6) x 00h
X offset bytes + Firmware Packet 1
Firmware Packet 2
Firmware Packet n + DFU suffix
ZLP
19

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