SAM4S16C Atmel Corporation, SAM4S16C Datasheet - Page 786

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SAM4S16C

Manufacturer Part Number
SAM4S16C
Description
Manufacturer
Atmel Corporation
Datasheets

Specifications of SAM4S16C

Flash (kbytes)
1024 Kbytes
Pin Count
100
# Of Touch Channels
32
Hardware Qtouch Acquisition
No
Max I/o Pins
79
Ext Interrupts
79
Usb Transceiver
1
Quadrature Decoder Channels
2
Usb Speed
Full Speed
Usb Interface
Device
Spi
3
Twi (i2c)
2
Uart
4
Ssc
1
Sd / Emmc
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
16
Adc Resolution (bits)
12
Adc Speed (ksps)
1000
Analog Comparators
1
Resistive Touch Screen
No
Dac Channels
2
Dac Resolution (bits)
12
Temp. Sensor
Yes
Crypto Engine
No
Sram (kbytes)
128
Self Program Memory
YES
External Bus Interface
1
Dram Memory
No
Nand Interface
Yes
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
1.8/3.3
Operating Voltage (vcc)
1.62 to 3.6
Fpu
No
Mpu / Mmu
Yes / No
Timers
6
Output Compare Channels
6
Input Capture Channels
6
Pwm Channels
4
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
Figure 33-10. Transmitter Control
33.5.4
33.5.5
786
786
Shift Register
UART_THR
TXEMPTY
TXRDY
UTXD
SAM4S
SAM4S
Peripheral DMA Controller
Test Modes
in UART_THR
Write Data 0
S
Data 0
in UART_THR
Both the receiver and the transmitter of the UART are connected to a Peripheral DMA Controller
(PDC) channel.
The peripheral data controller channels are programmed via registers that are mapped within
the UART user interface from the offset 0x100. The status bits are reported in the UART status
register (UART_SR) and can generate an interrupt.
The RXRDY bit triggers the PDC channel data transfer of the receiver. This results in a read of
the data in UART_RHR. The TXRDY bit triggers the PDC channel data transfer of the transmit-
ter. This results in a write of data in UART_THR.
The UART supports three test modes. These modes of operation are programmed by using the
field CHMODE (Channel Mode) in the mode register (UART_MR).
The Automatic Echo mode allows bit-by-bit retransmission. When a bit is received on the URXD
line, it is sent to the UTXD line. The transmitter operates normally, but has no effect on the
UTXD line.
The Local Loopback mode allows the transmitted characters to be received. UTXD and URXD
pins are not used and the output of the transmitter is internally connected to the input of the
receiver. The URXD pin level has no effect and the UTXD line is held high, as in idle state.
The Remote Loopback mode directly connects the URXD pin to the UTXD line. The transmitter
and the receiver are disabled and have no effect. This mode allows a bit-by-bit retransmission.
Write Data 1
Data 0
Data 0
P
stop
S
Data 1
Data 1
P
Data 1
stop
11100A–ATARM–28-Oct-11
11100A–ATARM–28-Oct-11

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