AT89C5131A-M Atmel Corporation, AT89C5131A-M Datasheet - Page 121

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AT89C5131A-M

Manufacturer Part Number
AT89C5131A-M
Description
Manufacturer
Atmel Corporation
Datasheets

Specifications of AT89C5131A-M

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)
2.7 to 5.5
Timers
4
Isp
UART/USB
Watchdog
Yes
Figure 21-2. SIE Block Diagram
21.1.2
4337K–USB–04/08
D+
D-
Function Interface Unit (FIU)
The Function Interface Unit provides the interface between the AT89C5131 and the SIE. It man-
ages transactions at the packet level with minimal intervention from the device firmware, which
reads and writes the endpoint FIFOs.
• Address checking.
• Clock generation (via DPLL).
End of Packet
Detection
Start of Packet
Detection
Clk48
(48 MHz)
Clock
Recovery
NRZI ‘NRZ
Bit Un-stuffing
Packet Bit Counter
USB Pattern Generator
Parallel to Serial Converter
Bit Stuffing
NRZI Converter
CRC16 Generator
SysClk
(12 MHz)
8
SYNC Detection
PID Decoder
Address Decoder
Serial to
P a r a l l e l
CRC5 and CRC16
Generation/Check
AT89C5130A/31A-M
DataIn [7:0]
DataOut
8
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