AT89C51SND1C-ROTUL Atmel, AT89C51SND1C-ROTUL Datasheet - Page 108

• Manufacturer Part Number: AT89C51SND1C-ROTUL
• Description: IC 8051 MCU FLASH 64K MP3 80TQFP
• Manufacturer: Atmel
• Series: 89Cr

Specifications of AT89C51SND1C-ROTUL

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, IDE/ATAPI, MMC, SPI, UART/USART, USB
• Peripherals: Audio, I²S, MP3, PCM, POR, WDT
• Number Of I /o: 44
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Ram Size: 2.25K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.3 V
• Data Converters: A/D 2x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-TQFP, 80-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

108
AT8xC51SND1C
Table 105. USBCLK Register
USBCLK (S:EAh) – USB Clock Divider Register
Reset Value = 0000 0000b
Number
7 - 2
1 - 0
Bit
7
-
Mnemonic Description
USBCD1:0
Bit
6
-
-
Reserved
The value read from these bits is always 0. Do not set these bits.
USB Controller Clock Divider
2-bit divider for USB controller clock generation.
5
-
4
-
3
-
2
-
USBCD1
1
4109L–8051–02/08
USBCD0
0