AT91FR40162SB-CU-999 Atmel, AT91FR40162SB-CU-999 Datasheet - Page 123
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AT91FR40162SB-CU-999
Manufacturer Part Number
AT91FR40162SB-CU-999
Description
IC MCU 32BIT RISC 121BGA
Manufacturer
Atmel
Series
AT91SAMr
Specifications of AT91FR40162SB-CU-999
Core Processor
ARM7
Core Size
16/32-Bit
Speed
75MHz
Connectivity
EBI/EMI, UART/USART
Peripherals
WDT
Number Of I /o
32
Program Memory Size
2MB (1M x 16)
Program Memory Type
FLASH
Ram Size
256K x 8
Voltage - Supply (vcc/vdd)
1.65 V ~ 1.95 V
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
121-BGA
Data Bus Width
32 bit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Data Converters
-
Lead Free Status / Rohs Status
Details
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Company
Part Number
Manufacturer
Quantity
Price
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18.4.3
18.4.4
18.4.5
18.4.6
6410B–ATARM–12-Jan-10
Receiver Ready
Parity Error
Framing Error
Time-out
Figure 18-5. Synchronous Mode: Character Reception
When a complete character is received, it is transferred to the US_RHR and the RXRDY status
bit in US_CSR is set. If US_RHR has not been read since the last transfer, the OVRE status bit
in US_CSR is set.
Each time a character is received, the receiver calculates the parity of the received data bits, in
accordance with the field PAR in US_MR. It then compares the result with the received parity bit.
If different, the parity error bit PARE in US_CSR is set.
If a character is received with a stop bit at low level and with at least one data bit at high level, a
framing error is generated. This sets FRAME in US_CSR.
This function allows an idle condition on the RXD line to be detected. The maximum delay for
which the USART should wait for a new character to arrive while the RXD line is inactive (high
level) is programmed in US_RTOR (Receiver Time-out). When this register is set to 0, no time-
out is detected. Otherwise, the receiver waits for a first character and then initializes a counter
which is decremented at each bit period and reloaded at each byte reception. When the counter
reaches 0, the TIMEOUT bit in US_CSR is set. The user can restart the wait for a first character
with the STTTO (Start Time-out) bit in US_CR.
Calculation of time-out duration:
Example: 8-bit, parity enabled 1 stop
Sampling
RXD
SCK
True Start Detection
D0
Duration
D1
= Value x
D2
D3
4
D4
x
Bit period
D5
AT91FR40162SB
D6
D7
Parity Bit
Stop Bit
123
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