AT89C5130A-M Atmel Corporation, AT89C5130A-M Datasheet - Page 150

• Manufacturer Part Number: AT89C5130A-M
• Manufacturer: Atmel Corporation

Specifications of AT89C5130A-M

• Flash (kbytes): 16 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

150
AT89C5130A/31A-M
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
141). FNUM is updated if a
(See “UFNUMH Register
“USBIEN Register USBIEN
FNUM9
FNUM1
1
1
“UFNUML Register
4337K–USB–04/08
150). It is
150.).
FNUM8
FNUM0
0
0