AT89C51SND2C-7FTUL Atmel, AT89C51SND2C-7FTUL Datasheet - Page 103

• 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. Universal Serial Bus
16.1
16.2
16.3
4341H–MP3–10/07
USB Mass Storage Class Bulk-Only Transport
USB Device Firmware Upgrade (DFU)
Description
The AT8xC51SND2C implements a USB device controller supporting full speed data transfer. In
addition to the default control endpoint 0, it provides 2 other endpoints, which can be configured
in control, bulk, interrupt or isochronous modes:
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•
This allows the firmware to be developed conforming to most USB device classes, for example:
•
•
•
Within the Bulk-only framework, the Control endpoint is only used to transport class-specific and
standard USB requests for device set-up and configuration. One Bulk-out endpoint is used to
transport commands and data from the host to the device. One Bulk in endpoint is used to trans-
port status and data from the device to the host.
The following AT8xC51SND2C configuration adheres to those requirements:
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•
•
The USB Device Firmware Update (DFU) protocol can be used to upgrade the on-chip Flash
memory of the AT89C51SND2C. This allows installing product enhancements and patches to
devices that are already in the field. 2 different configurations and descriptor sets are used to
support DFU functions. The Run-Time configuration co-exist with the usual functions of the
device, which is USB Mass Storage for AT89C51SND2C. It is used to initiate DFU from the nor-
mal operating mode. The DFU configuration is used to perform the firmware update after device
re-configuration and USB reset. It excludes any other function. Only the default control pipe
(endpoint 0) is used to support DFU services in both configurations.
The only possible value for the MaxPacketSize in the DFU configuration is 32 Bytes, which is the
size of the FIFO implemented for endpoint 0.
The USB device controller provides the hardware that the AT8xC51SND2C needs to interface a
USB link to a data flow stored in a double port memory.
It requires a 48 MHz reference clock provided by the clock controller as detailed in Section "",
page 104. This clock is used to generate a 12 MHz Full Speed bit clock from the received USB
differential data flow and to transmit data according to full speed USB device tolerance. Clock
recovery is done by a Digital Phase Locked Loop (DPLL) block.
The Serial Interface Engine (SIE) block performs NRZI encoding and decoding, bit stuffing, CRC
generation and checking, and the serial-parallel data conversion.
The Universal Function Interface (UFI) controls the interface between the data flow and the Dual
Port RAM, but also the interface with the C51 core itself.
USB Mass Storage Class Bulk-only Transport, Revision 1.0 - September 31, 1999
USB Human Interface Device Class, Version 1.1 - April 7, 1999
USB Device Firmware Upgrade Class, Revision 1.0 - May 13, 1999
Endpoint 0: 32 Bytes, Control In-Out
Endpoint 1: 64 Bytes, Bulk-in
Endpoint 2: 64 Bytes, Bulk-out
Endpoint 0: 32-Byte FIFO, default control endpoint
Endpoint 1, 2: 64-Byte Ping-pong FIFO,
AT8xC51SND2C/MP3B
103