AT91SAM7S256D-AU Atmel, AT91SAM7S256D-AU Datasheet - Page 540

• 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

36.3
Table 36-1.
36.4
36.4.1
36.4.2
36.4.3
36.4.4
36.4.5
36.4.6
Pin Name
ADVREF
AD0 - AD7
ADTRG
Signal Description
Product Dependencies
The ADC Controller clock (MCK) is always clocked.
The ADC interrupt line is connected on one of the internal sources of the Advanced Interrupt Controller. Using the
ADC interrupt requires the AIC to be programmed first.
The analog input pins can be multiplexed with PIO lines. In this case, the assignment of the ADC input is automat-
ically done as soon as the corresponding channel is enabled by writing the register ADC_CHER. By default, after
reset, the PIO line is configured as input with its pull-up enabled and the ADC input is connected to the GND.
The pin ADTRG may be shared with other peripheral functions through the PIO Controller. In this case, the PIO
Controller should be set accordingly to assign the pin ADTRG to the ADC function.
Timer Counters may or may not be used as hardware triggers depending on user requirements. Thus, some or all
of the timer counters may be non-connected.
For performance and electrical characteristics of the ADC, see the DC Characteristics section.
Power Management
Interrupt Sources
Analog Inputs
I/O Lines
Timer Triggers
Conversion Performances
ADC Pin Description
Description
Reference voltage
Analog input channels
External trigger
SAM7S Series [DATASHEET]
6175M–ATARM–26-Oct-12
540