AT83C5135 Atmel Corporation, AT83C5135 Datasheet - Page 130
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AT83C5135
Manufacturer Part Number
AT83C5135
Description
Manufacturer
Atmel Corporation
Datasheet
1.AT83C5134.pdf
(166 pages)
Specifications of AT83C5135
Max. Operating Frequency
32 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)
512
Operating Voltage (vcc)
2.7 to 3.6
Timers
4
Mask Rom (kbytes)
16
Watchdog
Yes
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AT83C5134/35/36
Table 21-16. UFNUMH Register
Reset Value = 00h
Table 21-17. UFNUML Register
Reset Value = 00h
Bit Number
Number
FNUM7
2-0
Bit
7 - 0
5
4
3
7
7
-
Bit Mnemonic Description
FNUM[10:8]
CRCERR
Mnemonic
FNUM[7:0]
CRCOK
UFNUMH (S:BBh, read-only)
USB Frame Number High Register
UFNUML (S:BAh, read-only)
USB Frame Number Low Register
FNUM6
-
Bit
6
6
-
Frame Number CRC OK
This bit is set by hardware when a new Frame Number in Start of Frame Packet is
received without CRC error.
This bit is updated after every Start of Frame packet receipt.
Important note: the Start of Frame interrupt is generated just after the PID receipt.
Frame Number CRC Error
This bit is set by hardware when a corrupted Frame Number in Start of Frame packet is
received.
This bit is updated after every Start of Frame packet receipt.
Important note: the Start of Frame interrupt is generated just after the PID receipt.
Reserved
The value read from this bit is always 0. Do not set this bit.
Frame Number
FNUM[10:8] are the upper 3 bits of the 11-bit Frame Number (see the
UFNUML (S:BAh, read-only) USB Frame Number Low Register” on page
provided in the last received SOF packet (see SOFINT in the
(S:BEh) USB Global Interrupt Enable Register” on page
corrupted SOF is received.
Description
Frame Number
FNUM[7:0] are the lower 8 bits of the 11-bit Frame Number
UFNUMH (S:BBh, read-only) USB Frame Number High Register” on page
CRCOK
FNUM5
5
5
CRCERR
FNUM4
4
4
FNUM3
3
3
-
FNUM10
FNUM2
2
2
122). FNUM is updated if a
(See “UFNUMH Register
“USBIEN Register USBIEN
FNUM9
FNUM1
1
1
“UFNUML Register
7683C–USB–11/07
130). It is
130.).
FNUM8
FNUM0
0
0
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