AT91SAM7A1-AU Atmel, AT91SAM7A1-AU Datasheet - Page 146

• Manufacturer Part Number: AT91SAM7A1-AU
• Description: IC ARM7 MCU 32BIT ROMLESS144LQFP
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91SAM7A1-AU

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 40MHz
• Connectivity: CAN, EBI/EMI, SPI, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 49
• Program Memory Type: ROMless
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 144-LQFP
• For Use With: AT91SAM7A1-EK - BOARD EVAL FOR AT91SAM7A1
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

18. Universal Synchronous/Asynchronous Receiver/Transmitter (USART)
18.1
18.2
146
Description
Synoptic
AT91SAM7A1
The AT91SAM7A1 includes three USARTs. Each transmitter and receiver module is con-
nected to the Peripheral Data Controller.
The main features are:
Figure 18-1. USART Synoptic
• Programmable baud rate generator
• Parity, framing and overrun error detection
• Supports Hardware LIN protocol (specification 1.2)
• Idle flag for J1587 protocol
• Line break generation and detection
• Automatic echo, local loopback and remote loopback channel modes
• Multidrop mode: address detection and generation
• Interrupt generation
• Two dedicated Peripheral Data Controller channels per USART
• 5- to 9-bit character length
INT
CORECLK
ASB
APB
AMBA
USART
CLOCK
PMC
TX_RDY
Channel
TX
Interrupt Control
Peripheral Data
Control Logic
END
Baud Rate
Controller
Generator
Channel
RX
RX_RDY
Baud Rate
Clock
PIO CLOCK
USART Channel
Transmitter
Receiver
6048B–ATARM–29-Jun-06
PIO
RXD
TXD
SCK