AT89C5132 Atmel Corporation, AT89C5132 Datasheet - Page 80

• Manufacturer Part Number: AT89C5132
• Manufacturer: Atmel Corporation

Specifications of AT89C5132

• Flash (kbytes): 64 Kbytes
• Max. Operating Frequency: 20 MHz
• Cpu: 8051-12C
• Max I/o Pins: 44
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 1
• Uart: 1
• Adc Channels: 2
• Adc Resolution (bits): 10
• Adc Speed (ksps): 22.7
• Sram (kbytes): 2.25
• Self Program Memory: API
• Operating Voltage (vcc): 2.7 to 3.6
• Timers: 2
• Isp: UART/USB
• Watchdog: Yes

80
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
Number
Number
Number
FNUM7
7 - 3
2 - 0
Bit
7 - 0
7 - 2
5
4
3
Bit
Bit
7
7
7
-
-
Mnemonic
FNUM10:8
CRCERR
CRCOK
Mnemonic Description
Mnemonic Description
FNUM7:0
FNUM6
Bit
-
-
Bit
Bit
6
6
6
-
-
-
Description
Reserved
The values read from these Bits are always 0. Do not set these Bits.
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.
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.
Reserved
The values read from this Bits are always 0. Do not set this bit.
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.
Frame Number
Lower 8 Bits of the 11-bit Frame Number.
Reserved
The values read from these Bits are always 0. Do not set these Bits.
CRCOK
FNUM5
5
5
5
-
CRCERR
FNUM4
4
4
4
-
FNUM3
3
3
3
-
-
FNUM10
FNUM2
2
2
2
-
USBCD1
FNUM1
FNUM9
1
1
1
4173E–USB–09/07
USBCD0
FNUM0
FNUM8
0
0
0