AT89C51SND2C-7FTUL Atmel, AT89C51SND2C-7FTUL Datasheet - Page 109

• Manufacturer Part Number: AT89C51SND2C-7FTUL
• Description: IC 8051 MCU FLASH 64K MP3 100BGA
• Manufacturer: Atmel
• Series: 89Cr

Specifications of AT89C51SND2C-7FTUL

• 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: 32
• 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; D/A 2x20b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-TFBGA
• Data Bus Width: 8 bit
• Data Ram Size: 2.25 KB
• Interface Type: ATAPI, I2S, IDE, SPI, UART, USB
• Maximum Clock Frequency: 40 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 2
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details
• Other names: AT89C51SND2C7FTUL

16.5
16.5.1
16.5.2
16.5.3
Figure 16-8. Endpoint FIFO Configuration
4341H–MP3–10/07
Read/Write Data FIFO
Endpoint 0
Endpoint 2
Read Data FIFO
Write Data FIFO
FIFO Mapping
UEPSTA0
UEPSTA2
The read access for each OUT endpoint is performed using the UEPDATX register.
After a new valid packet has been received on an Endpoint, the data are stored into the FIFO
and the Byte counter of the endpoint is updated (UBYCTX registers). The firmware has to store
the endpoint Byte counter before any access to the endpoint FIFO. The Byte counter is not
updated when reading the FIFO.
To read data from an endpoint, select the correct endpoint number in UEPNUM and read the
UEPDATX register. This action automatically decreases the corresponding address vector, and
the next data is then available in the UEPDATX register.
The write access for each IN endpoint is performed using the UEPDATX register.
To write a Byte into an IN endpoint FIFO, select the correct endpoint number in UEPNUM and
write into the UEPDATX register. The corresponding address vector is automatically increased,
and another write can be carried out.
Warning 1: The Byte counter is not updated.
Warning 2: Do not write more Bytes than supported by the corresponding endpoint.
UEPCON0
UEPCON2
UBYCT2
UBYCT0
UEPDAT0
UEPDAT2
UEPNUM
0
1
2
X
AT8xC51SND2C/MP3B
UEPSTAX
SFR Registers
UEPCONX
UBYCTX
UEPDATX
109