AT91SAM datasheet(56/67 Pages) ATMEL

56 / 67 page

11100BS–ATARM–31-Jul-12

SAM4S Series [Preliminary]

• Single ended/differential conversion

• Programmable gain: 1, 2, 4

11.11 Digital-to-Analog Converter (DAC)

• Up to 2 channel 12-bit DAC

• Up to 2 mega-samples conversion rate in single channel mode

• Flexible conversion range

• Multiple trigger sources for each channel

• 2 Sample/Hold (S/H) outputs

• Built-in offset and gain calibration

• Possible to drive output to ground

• Possible to use as input to analog comparator or ADC (as an internal wire and without S/H

stage)

• Two PDC channels

• Power reduction mode

11.12 Static Memory Controller

• 16-Mbyte Address Space per Chip Select

• 8- bit Data Bus

• Word, Halfword, Byte Transfers

• Byte Write or Byte Select Lines

• Programmable Setup, Pulse And Hold Time for Read Signals per Chip Select

• Programmable Setup, Pulse And Hold Time for Write Signals per Chip Select

• Programmable Data Float Time per Chip Select

• Compliant with LCD Module

• External Wait Request

• Automatic Switch to Slow Clock Mode

• Asynchronous Read in Page Mode Supported: Page Size Ranges from 4 to 32 Bytes

• NAND Flash additional logic supporting NAND Flash with Multiplexed Data/Address buses

• Hardware Configurable number of chip select from 1 to 4

• Programmable timing on a per chip select basis

11.13 Analog Comparator

• One analog comparator

• High speed option vs. low-power option

– 170 µA/xx ns active current consumption/propagation delay

– 20 µA/xx ns active current consumption/propagation delay

• Selectable input hysteresis

– 0, 15 mV, 30mV (Typ)

• Minus input selection:

– DAC outputs

AT91SAM Datasheet(PDF) 56 Page - ATMEL Corporation