AT91SAM7X128 Atmel, AT91SAM7X128 Datasheet - Page 658

• Manufacturer Part Number: AT91SAM7X128
• Description: MCU 32-Bit 91S ARM7TDMI RISC 128KB Flash 1.8V/3.3V 100-Pin LQFP
• Manufacturer: Atmel

Specifications of AT91SAM7X128

• Package: 100LQFP
• Device Core: ARM7TDMI
• Family Name: 91S
• Maximum Speed: 55 MHz
• Ram Size: 32 KB
• Program Memory Size: 128 KB
• Operating Supply Voltage: 1.8|3.3 V
• Data Bus Width: 32 Bit
• Program Memory Type: Flash
• Number Of Programmable I/os: 62
• Interface Type: CAN/Ethernet/SPI/I2S/TWI/USART/USB
• On-chip Adc: 8-chx10-bit
• Operating Temperature: -40 to 85 °C
• Number Of Timers: 3

41.3.11.2
41.3.11.3
41.3.11.4
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AT91SAM7X512/256/128 Preliminary
USART: Hardware Handshaking – Two Characters Sent
USART: RXBRK Flag Error in Asynchronous Mode
USART: DCD is Active High instead of Low.
None.
If CTS switches from 0 to 1 during the TX of a character and if the holding register (US_THR) is
not empty, the content of US_THR will also be transmitted.
Don't use the PDC in transmit mode and do not fill US_THR before TXEMPTY is set at 1.
When timeguard is 0, RXBRK is not set when the break character is located just after the Stop
bit. FRAME (Frame Error) is set instead.
Timeguard should be > 0.
The DCD signal is active at High level in the USART Modem Mode .
DCD should be active at Low level.
Add an inverter.
Problem Fix/Workaround
Problem Fix/Workaround
Problem Fix/Workaround
6120H–ATARM–17-Feb-09