AT91SAM7S256D-AU Atmel, AT91SAM7S256D-AU Datasheet - Page 270

• Manufacturer Part Number: AT91SAM7S256D-AU
• Description: ARM Microcontrollers - MCU 256K Flash SRAM 64K ARM based MCU
• Manufacturer: Atmel
• Series: SAM7S256r

Specifications of AT91SAM7S256D-AU

• Rohs: yes
• Core: ARM
• Processor Series: AT91SAM
• Data Bus Width: 16 bit/32 bit
• Maximum Clock Frequency: 55 MHz
• Program Memory Size: 256 KB
• Data Ram Size: 64 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 3 V to 3.6 V
• Operating Temperature Range: - 40 C to + 85 C
• Package / Case: LQFP-64
• Mounting Style: SMD/SMT
• Interface Type: 2-Wire, I2S, SPI, USART
• Length: 7 mm

28.3
28.4
Table 28-1.
28.5
28.5.1
28.5.2
28.5.3
Pin Name
MISO
MOSI
SPCK
NPCS1-NPCS3
NPCS0/NSS
Application Block Diagram
Figure 28-2. Application Block Diagram: Single Master/Multiple Slave Implementation
Signal Description
Product Dependencies
The pins used for interfacing the compliant external devices may be multiplexed with PIO lines. The programmer
must first program the PIO controllers to assign the SPI pins to their peripheral functions.
The SPI may be clocked through the Power Management Controller (PMC), thus the programmer must first config-
ure the PMC to enable the SPI clock.
The SPI interface has an interrupt line connected to the Advanced Interrupt Controller (AIC). Handling the SPI
interrupt requires programming the AIC before configuring the SPI.
I/O Lines
Power Management
Interrupt
Signal Description
SPI Master
Pin Description
Master In Slave Out
Master Out Slave In
Serial Clock
Peripheral Chip Selects
Peripheral Chip Select/Slave Select
SPCK
MISO
MOSI
NPCS0
NPCS1
NPCS2
NPCS3
NC
SAM7S Series [DATASHEET]
Master
Input
Output
Output
Output
Output
SPCK
MISO
MOSI
NSS
SPCK
MISO
MOSI
NSS
SPCK
MISO
MOSI
NSS
6175M–ATARM–26-Oct-12
Slave 0
Slave 1
Slave 2
Type
Slave
Output
Input
Input
Unused
Input
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