AT89C5131A-L Atmel Corporation, AT89C5131A-L Datasheet - Page 118

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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
Function Interface Unit (FIU)
Figure 58. UFI Block Diagram
Figure 59. Minimum Intervention from the USB Device Firmware
118
AT89C5131A-L
HOST
UFI
C51
IN Transactions:
HOST
UFI
C51
OUT Transactions:
DPLL
SIE
OUT DATA0 (n bytes)
IN
Endpoint FIFO write
NACK
FIU
The Function Interface Unit provides the interface between the AT89C5131 and the SIE.
It manages transactions at the packet level with minimal intervention from the device
firmware, which reads and writes the endpoint FIFOs.
DPR Control
USB Side
Transfer
Control
FSM
ACK
Asynchronous Information
Transfer
IN
interrupt C51
User DPRAM
DATA1
Endpoint FIFO read (n bytes)
OUT
Endpoint 6
Endpoint 5
Endpoint 4
Endpoint 3
Endpoint 2
Endpoint 1
Endpoint 0
DATA1
IN
NACK
CSREG 0 to 7
DPR Control
mP side
DATA1
Registers
Bank
OUT
ACK
interrupt C51
DATA1
C51
Microcontroller
Interface
Up to 48 MHz
UC_sysclk
Endpoint FIFO write
ACK
4338F–USB–08/07

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