AT91SAM7S256D-AU Atmel, AT91SAM7S256D-AU Datasheet - Page 81

• 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

15. Periodic Interval Timer (PIT)
15.1
15.2
Figure 15-1. Periodic Interval Timer
Prescaler
MCK
Overview
The Periodic Interval Timer (PIT) provides the operating system’s scheduler interrupt. It is designed to offer maxi-
mum accuracy and efficient management, even for systems with long response time.
Block Diagram
MCK/16
0
Counter
CPIV
CPIV
20-bit
0
1
PIT_PIVR
PIT_PIIR
PIT_MR
= ?
PIV
0
0
PICNT
Adder
12-bit
PICNT
1
SAM7S Series [DATASHEET]
PIT_SR
read PIT_PIVR
PITS
6175M–ATARM–26-Oct-12
set
reset
PIT_MR
PITIEN
pit_irq
81