AT89C5132 Atmel Corporation, AT89C5132 Datasheet - Page 19

• Manufacturer Part Number: AT89C5132
• Manufacturer: Atmel Corporation

Specifications of AT89C5132

• Flash (kbytes): 64 Kbytes
• Max. Operating Frequency: 20 MHz
• Cpu: 8051-12C
• Max I/o Pins: 44
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 1
• Uart: 1
• Adc Channels: 2
• Adc Resolution (bits): 10
• Adc Speed (ksps): 22.7
• Sram (kbytes): 2.25
• Self Program Memory: API
• Operating Voltage (vcc): 2.7 to 3.6
• Timers: 2
• Isp: UART/USB
• Watchdog: Yes

Figure 5. Example of Firmware Download Zero Length DFU_DNLOAD Request
Answers from
Bootloader
Reading the Flash
First Request from Host
4256B–USB–03/06
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.
After each program request, the Host can request the device state and status by sending a
DFU_GETSTATUS message.
If the device status indicates an error, the host can send a DFU_CLRSTATUS request to the
device.
The flow described below allows the user to read data in the Flash memory. A blank check com-
mand on the Flash memory is possible with this flow.
This operation is performed in 2 steps:
1. DFU_DNLOAD request with the read command (6 bytes)
2. DFU_UPLOAD request which correspond to the immediate previous command.
The Host sends a DFU Download request with a Display command in the data field.
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
SETUP
OUT
IN
DFU_DNLOAD
Display_Data (6 bytes)
ZLP
AT89C5132
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