AT91SAM7S256D-AU Atmel, AT91SAM7S256D-AU Datasheet - Page 387
AT91SAM7S256D-AU
Manufacturer Part Number
AT91SAM7S256D-AU
Description
ARM Microcontrollers - MCU 256K Flash SRAM 64K ARM based MCU
Manufacturer
Atmel
Series
SAM7S256r
Datasheet
1.AT91SAM7S256D-AU.pdf
(775 pages)
Specifications of AT91SAM7S256D-AU
Rohs
yes
Core
ARM
Processor Series
AT91SAM
Data Bus Width
16 bit/32 bit
Maximum Clock Frequency
55 MHz
Program Memory Size
256 KB
Data Ram Size
64 KB
On-chip Adc
Yes
Operating Supply Voltage
3 V to 3.6 V
Operating Temperature Range
- 40 C to + 85 C
Package / Case
LQFP-64
Mounting Style
SMD/SMT
Interface Type
2-Wire, I2S, SPI, USART
Length
7 mm
Available stocks
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Price
Company:
Part Number:
AT91SAM7S256D-AU
Manufacturer:
ATMEL
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101
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31.6.8.2
31.6.8.3
31.6.8.4
Automatic echo mode allows bit-by-bit retransmission. When a bit is received on the RXD pin, it is sent to the TXD
pin, as shown in
nected to the receiver input, thus the receiver remains active.
Figure 31-31. Automatic Echo Mode Configuration
Local loopback mode connects the output of the transmitter directly to the input of the receiver, as shown in
31-32. The TXD and RXD pins are not used. The RXD pin has no effect on the receiver and the TXD pin is contin-
uously driven high, as in idle state.
Figure 31-32. Local Loopback Mode Configuration
Remote loopback mode directly connects the RXD pin to the TXD pin, as shown in
and the receiver are disabled and have no effect. This mode allows bit-by-bit retransmission.
Figure 31-33. Remote Loopback Mode Configuration
Automatic Echo Mode
Local Loopback Mode
Remote Loopback Mode
Figure
31-31. Programming the transmitter has no effect on the TXD pin. The RXD pin is still con-
Transmitter
Transmitter
Transmitter
Receiver
Receiver
Receiver
1
1
RXD
TXD
RXD
TXD
RXD
TXD
SAM7S Series [DATASHEET]
Figure
6175M–ATARM–26-Oct-12
31-33. The transmitter
Figure
387
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