AT91SAM7X128 Atmel, AT91SAM7X128 Datasheet - Page 315
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AT91SAM7X128
Manufacturer Part Number
AT91SAM7X128
Description
MCU 32-Bit 91S ARM7TDMI RISC 128KB Flash 1.8V/3.3V 100-Pin LQFP
Manufacturer
Atmel
Datasheet
1.AT91SAM7X512-AU-999.pdf
(687 pages)
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
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30.6.3.4
Figure 30-11. Receiver Status
6120H–ATARM–17-Feb-09
Baud Rate
US_RHR
RXRDY
US_CR
OVRE
Clock
Read
Write
Receiver Operations
RXD
Start
Bit
D0
Figure 30-10. Synchronous Mode Character Reception
When a character reception is completed, it is transferred to the Receive Holding Register
(US_RHR) and the RXRDY bit in the Status Register (US_CSR) rises. If a character is com-
pleted while the RXRDY is set, the OVRE (Overrun Error) bit is set. The last character is
transferred into US_RHR and overwrites the previous one. The OVRE bit is cleared by writing
the Control Register (US_CR) with the RSTSTA (Reset Status) bit at 1.
D1
Example: 8-bit, Parity Enabled 1 Stop
Baud Rate
Sampling
D2
Clock
RXD
D3
D4
D5
Start
D6
D7
AT91SAM7X512/256/128 Preliminary
Parity
Bit
D0
Stop
Bit
Start
Bit
D1
D0
D1
D2
D2
D3
D3
D4
D4
D5
D6
D5
D7
Parity
Bit
Stop
D6
Bit
RSTSTA = 1
D7
Parity Bit
Stop Bit
315
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