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AT89C5132-ROTUL Folha de dados(PDF) 80 Page - ATMEL Corporation

Nome de Peças AT89C5132-ROTUL
Descrição Electrónicos  USB Microcontroller with 64K Bytes Flash Memory
PDF  182 Pages
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Fabricante Electrônico  ATMEL [ATMEL Corporation]
Página de início  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT89C5132-ROTUL Folha de dados(HTML) 80 Page - ATMEL Corporation

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4173E–USB–09/07
AT89C5132
Table 68. UFNUML Register
UFNUML (S:BAh, Read-only) – USB Frame Number Low Register
Reset Value = 00h
Table 69. UFNUMH Register
UFNUMH (S:BBh, Read-only) – USB Frame Number High Register
Reset Value = 00h
Table 70. USBCLK Register
USBCLK (S:EAh) – USB Clock Divider Register
7
6
5
4
3
2
1
0
FNUM7
FNUM6
FNUM5
FNUM4
FNUM3
FNUM2
FNUM1
FNUM0
Bit
Number
Bit
Mnemonic Description
7 - 0
FNUM7:0
Frame Number
Lower 8 Bits of the 11-bit Frame Number.
7
6
5
4
3
2
1
0
-
-
CRCOK
CRCERR
-
FNUM10
FNUM9
FNUM8
Bit
Number
Bit
Mnemonic
Description
7 - 3
-
Reserved
The values read from these Bits are always 0. Do not set these Bits.
5
CRCOK
Frame Number CRC OK Bit
Set by hardware after a non corrupted Frame Number in Start of Frame Packet is
received.
Updated after every Start Of Frame packet reception.
Note: The Start Of Frame interrupt is generated just after the PID receipt.
4
CRCERR
Frame Number CRC Error Bit
Set by hardware after a corrupted Frame Number in Start of Frame Packet is
received.
Updated after every Start Of Frame packet reception.
Note: The Start Of Frame interrupt is generated just after the PID receipt.
3
-
Reserved
The values read from this Bits are always 0. Do not set this bit.
2 - 0
FNUM10:8
Frame Number
Upper 3 Bits of the 11-bit Frame Number. It is provided in the last received SOF
packet. FNUM does not change if a corrupted SOF is received.
7
6
5
4
3
2
1
0
-
-
-
-
-
-
USBCD1
USBCD0
Bit
Number
Bit
Mnemonic Description
7 - 2
-
Reserved
The values read from these Bits are always 0. Do not set these Bits.



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