AT43USB320A_04 ATMEL [ATMEL Corporation], AT43USB320A_04 Datasheet - Page 52

• Manufacturer Part Number: AT43USB320A_04
• Description: Full-speed USB Microcontroller with an Embedded Hub
• Manufacturer: ATMEL [ATMEL Corporation]

Serial Peripheral
Interface (SPI)
Figure 15. SPI Block Diagram
52
AT43USB320A
SPI Status Register
SELECT
4 16 64 128
SYSCLK
Divider
SPI Control
The Serial Peripheral Interface (SPI) allows high-speed synchronous data transfer between
the AT43USB320A a nd peripheral devices or betwee n several AVR d evice s. The
AT43USB320A SPI features include the following:
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•
•
•
•
•
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Full-duplex, 3-wire Synchronous Data Transfer
Master or Slave Operation
LSB First or MSB First Data Transfer
Four Programmable Bit Rates
End of Transmission Interrupt Flag
Write Collision Flag Protection
Wakeup from Idle Mode (Slave Mode Only)
SPI Interrupt
SPI Clock (Master)
Request
MSTR
SPE
8
Data Bus
MSB
Internal
8
8-bit Shift Register
Read Data Buffer
8
SPI Control Register
Clock
Logic
LSB
Clock
S
M
M
S
M
S
MOSI
MISO
SCK
PB5
PB7
PB6
PB4
SS
1443E–USB–4/04