ATA6613 ATMEL Corporation, ATA6613 Datasheet - Page 184

• Manufacturer Part Number: ATA6613
• Description: Ata6613
• Manufacturer: ATMEL Corporation

6.16
184
Serial Peripheral Interface – SPI
ATA6612/ATA6613
The Serial Peripheral Interface (SPI) allows high-speed synchronous data transfer between the
ATA6612/ATA6613 and peripheral devices or between several AVR devices. The
ATA6612/ATA6613 SPI includes the following features:
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The USART can also be used in Master SPI mode (see
The PRSPI bit in
enable SPI module.
Figure 6-65. SPI Block Diagram
Note:
Full-duplex, Three-wire Synchronous Data Transfer
Master or Slave Operation
LSB First or MSB First Data Transfer
Seven Programmable Bit Rates
End of Transmission Interrupt Flag
Write Collision Flag Protection
Wake-up from Idle Mode
Double Speed (CK/2) Master SPI Mode
1. Refer to
/2/4/8/16/32/64/128
SPI STATUS REGISTER
“Power Reduction Register - PRR” on page 66
Table 6-32 on page 97
DIVIDER
SELECT
XTAL
SPI CONTROL
SPI CLOCK (MASTER)
SPI INTERRUPT
REQUEST
(1)
MSTR
SPE
8
for SPI pin placement.
MSB
INTERNAL
DATA BUS
8
8 BIT SHIFT REGISTER
READ DATA BUFFER
8
SPI CONTROL REGISTER
CLOCK
LOGIC
“USART in SPI Mode” on page
LSB
CLOCK
M
M
S
S
S
M
must be written to zero to
MOSI
MISO
SCK
SS
9111C–AUTO–02/08
220).