AT89C5131A-M Atmel Corporation, AT89C5131A-M Datasheet - Page 145
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AT89C5131A-M
Manufacturer Part Number
AT89C5131A-M
Description
Manufacturer
Atmel Corporation
Datasheets
1.AT89C5130A-M.pdf
(188 pages)
2.AT89C5130A-M.pdf
(4 pages)
3.AT89C5130A-M.pdf
(34 pages)
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
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4337K–USB–04/08
Table 21-10. UEPDATX Register
Reset Value = XXh
Table 21-11. UBYCTLX Register
Reset Value = 00h
Bit Number
Bit Number
BYCT7
FDAT7
7 - 0
7 - 0
7
7
Mnemonic
Mnemonic
FDAT
BYCT[7:0]
UEPDATX (S:CFh)
USB FIFO Data Endpoint X (X = EPNUM set in UEPNUM Register UEPNUM
(S:C7h) USB Endpoint Number)
UBYCTLX (S:E2h)
USB Byte Count Low Register X (X = EPNUM set in UEPNUM Register UEP-
NUM (S:C7h) USB Endpoint Number)
BYCT6
FDAT6
Bit
Bit
6
6
[7:0]
Description
Endpoint X FIFO data
Data byte to be written to FIFO or data byte to be read from the FIFO, for the Endpoint X
(see EPNUM).
Description
Byte Count LSB
Least Significant Byte of the byte count of a received data packet. The most significant
part is provided by the UBYCTHX Register UBYCTHX (S:E3h) USB Byte Count High
Register X (X = EPNUM set in UEPNUM Register UEPNUM (S:C7h) USB Endpoint
Number) (see Figure 21-11 on page 145). This byte count is equal to the number of data
bytes received after the Data PID.
BYCT5
FDAT5
5
5
BYCT4
FDAT4
4
4
BYCT3
FDAT3
3
3
AT89C5130A/31A-M
BYCT2
FDAT2
2
2
BYCT1
FDAT1
1
1
BYCT0
FDAT0
0
0
145
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