AT89C51SND1C-7HTUL Atmel, AT89C51SND1C-7HTUL Datasheet - Page 116

• Manufacturer Part Number: AT89C51SND1C-7HTUL
• Description: IC MCU 64KB FLASH MEM 81-CBGA
• Manufacturer: Atmel
• Series: 89Cr

Specifications of AT89C51SND1C-7HTUL

• 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: 81-CBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Figure 16-12. Configuration Flow
16.5
Figure 16-13. Command Line Controller Block Diagram
16.5.1
116
Command Line Controller
AT8xC51SND1C
Command Transmitter
Command Transmitter
Command Receiver
RX Pointer
TX Pointer
MMCON0.4
MMCON0.5
CRPTR
CTPTR
As shown in Figure 16-13, the command line controller is divided in 2 channels: the command
transmitter channel that handles the command transmission to the card through the MCMD line
and the command receiver channel that handles the response reception from the card through
the MCMD line. These channels are detailed in the following sections.
For sending a command to the card, user must load the command index (1 Byte) and argument
(4 Bytes) in the command transmit FIFO using the MMCMD register. Before starting transmis-
sion by setting and clearing the CMDEN bit in MMCON1 register, user must first configure:
•
•
17 - Byte FIFO
5-Byte FIFO
MMCMD
MMCMD
RESPEN bit in MMCON1 register to indicate whether a response is expected or not.
RFMT bit in MMCON0 register to indicate the response size expected.
MMSTA.0
CFLCK
Read
Write
MMCON1.0
Data Converter
CMDEN
Data Converter
RESPEN
MMCON1.1
// -> Serial
Serial -> //
Finished State Machine
Finished State Machine
RX COMMAND Line
TX COMMAND Line
Configure MMC Clock
MMC Controller
Configuration
MMCLK = XXh
MMCON0.1
MMCEN = 1
FLOWC = 0
RFMT
MMSTA.2
CRC7S
CRC7 and Format
MMCON0.0
Generator
CRCDIS
CRC7
Checker
RESPFS
MMSTA.1
MMINT.5
MMINT.6
EOCI
EORI
MCMD
4109L–8051–02/08