AT89C51SND2C-7FTUL Atmel, AT89C51SND2C-7FTUL Datasheet - Page 162

• 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

19.3.5
162
AT8xC51SND2C/MP3B
Master Mode with Interrupt
Figure 19-9. Master SPI Polling Flows
Figure 19-10 shows the initialization phase and the transfer phase flows using the interrupt.
Using this flow prevents any overrun error occurrence.
The bit rate is selected according to Table 19-1.
The transfer format depends on the slave peripheral.
SS may be deasserted between transfers depending also on the slave peripheral.
Reading SPSTA at the beginning of the ISR is mandatory for clearing the SPIF flag. Clear is
effective when reading SPDAT.
program CPOL & CPHA
Select Master Mode
SPI Initialization
Disable interrupt
Polling Policy
program SPR2:0
Select Bit Rate
Select Format
Enable SPI
MSTR = 1
SPEN = 1
SPIE = 0
write data in SPDAT
Get Data Received
End Of Transfer?
Polling Policy
Last Transfer?
Deselect Slave
SPI Transfer
Start Transfer
Select Slave
read SPDAT
SPIF = 1?
Pn.x = H
Pn.x = L
4341H–MP3–10/07