AT89C5130A-M Atmel Corporation, AT89C5130A-M Datasheet - Page 146

• 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

146
AT89C5130A/31A-M
Table 21-12. UBYCTHX Register
Reset Value = 00h
Bit Number
7-2
2-0
7
-
Bit Mnemonic Description
BYCT[10:8]
UBYCTHX (S:E3h)
USB Byte Count High Register X (X = EPNUM set in UEPNUM Register UEP-
NUM (S:C7h) USB Endpoint Number)
6
-
-
Reserved
The value read from these bits is always 0. Do not set these bits.
Byte Count MSB
Most Significant Byte of the byte count of a received data packet. The Least significant
part is provided by UBYCTLX Register UBYCTLX (S:E2h) USB Byte Count Low
Register X (X = EPNUM set in UEPNUM Register UEPNUM (S:C7h) USB Endpoint
Number) (see Figure 21-11 on page 145).
5
-
4
-
3
-
2
-
BYCT9
1
4337K–USB–04/08
BYCT8
0