AT91SAM7S256D-AU Atmel, AT91SAM7S256D-AU Datasheet - Page 30

• 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

9.4
Figure 9-4. Power Management Controller Block Diagram
Advanced Interrupt Controller
Controls the interrupt lines (nIRQ and nFIQ) of an ARM Processor
Individually maskable and vectored interrupt sources
8-level Priority Controller
Vectoring
Protect Mode
Fast Forcing
General Interrupt Mask
Source 0 is reserved for the Fast Interrupt Input (FIQ)
Source 1 is reserved for system peripherals RTT, PIT, EFC, PMC, DBGU, etc.)
Other sources control the peripheral interrupts or external interrupts
Programmable edge-triggered or level-sensitive internal sources
Programmable positive/negative edge-triggered or high/low level-sensitive external sources
Drives the normal interrupt of the processor
Handles priority of the interrupt sources
Higher priority interrupts can be served during service of lower priority interrupt
Optimizes interrupt service routine branch and execution
One 32-bit vector register per interrupt source
Interrupt vector register reads the corresponding current interrupt vector
Easy debugging by preventing automatic operations
Permits redirecting any interrupt source on the fast interrupt
Provides processor synchronization on events without triggering an interrupt
MAINCK
MAINCK
PLLCK
PLLCK
SLCK
SLCK
PLLCK
Master Clock Controller
Programmable Clock Controller
/1,/2,/4,...,/64
Prescaler
USB Clock Controller
/1,/2,/4,...,/64
ON/OFF
Divider
/1,/2,/4
Prescaler
Processor
Controller
Idle Mode
Clock Controller
Clock
Peripherals
ON/OFF
PCK
int
MCK
periph_clk[2..14]
pck[0..2]
usb_suspend
UDPCK
SAM7S Series [DATASHEET]
6175M–ATARM–26-Oct-12
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