ATSAM3U-EK Atmel, ATSAM3U-EK Datasheet - Page 669
ATSAM3U-EK
Manufacturer Part Number
ATSAM3U-EK
Description
KIT EVAL FOR AT91SAM3U CORTEX
Manufacturer
Atmel
Type
MCUr
Datasheets
1.ATSAM3U-EK.pdf
(2 pages)
2.ATSAM3U-EK.pdf
(61 pages)
3.ATSAM3U-EK.pdf
(1171 pages)
4.ATSAM3U-EK.pdf
(53 pages)
Specifications of ATSAM3U-EK
Contents
Board
Processor To Be Evaluated
SAM3U
Data Bus Width
32 bit
Interface Type
RS-232, USB
Operating Supply Voltage
3 V
Silicon Manufacturer
Atmel
Core Architecture
ARM
Core Sub-architecture
Cortex - M3
Silicon Core Number
SAM3U4E
Silicon Family Name
SAM3U
Kit Contents
Board CD Docs
Rohs Compliant
Yes
For Use With/related Products
AT91SAM3U
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATSAM3U-EK
Manufacturer:
Atmel
Quantity:
10
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Figure 34-6. Receiver Overrun
34.4.2.5
Figure 34-7. Parity Error
34.4.2.6
Figure 34-8. Receiver Framing Error
6430D–ATARM–25-Mar-11
RXRDY
OVRE
URXD
RXRDY
URXD
PARE
FRAME
RXRDY
URXD
S
Parity Error
Receiver Framing Error
D0
S
S
D1
D0
D0
D2
Each time a character is received, the receiver calculates the parity of the received data bits, in
accordance with the field PAR in UART_MR. It then compares the result with the received parity
bit. If different, the parity error bit PARE in UART_SR is set at the same time the RXRDY is set.
The parity bit is cleared when the control register UART_CR is written with the bit RSTSTA
(Reset Status) at 1. If a new character is received before the reset status command is written,
the PARE bit remains at 1.
When a start bit is detected, it generates a character reception when all the data bits have been
sampled. The stop bit is also sampled and when it is detected at 0, the FRAME (Framing Error)
bit in UART_SR is set at the same time the RXRDY bit is set. The FRAME bit remains high until
the control register UART_CR is written with the bit RSTSTA at 1.
D1
D1
D3
D2
D2
D4
D3
D3
D5
D4
D4
D6
D5
D5
D7
D6
D6
P
Wrong Parity Bit
D7
D7
stop
P
P
S
Detected at 0
stop
Stop Bit
stop
D0
D1
D2
D3
RSTSTA
RSTSTA
D4
D5
SAM3U Series
D6
D7
P
stop
RSTSTA
669
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