AT89C51SND1C-ROTUL Atmel, AT89C51SND1C-ROTUL Datasheet - Page 153
AT89C51SND1C-ROTUL
Manufacturer Part Number
AT89C51SND1C-ROTUL
Description
IC 8051 MCU FLASH 64K MP3 80TQFP
Manufacturer
Atmel
Series
89Cr
Datasheet
1.AT80C51SND1C-ROTIL.pdf
(213 pages)
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
-
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19.3.5
4109L–8051–02/08
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 132.
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
AT8xC51SND1C
153
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