SAM7S16 Atmel Corporation, SAM7S16 Datasheet - Page 368

• Manufacturer Part Number: SAM7S16
• Manufacturer: Atmel Corporation

Specifications of SAM7S16

• Flash (kbytes): 16 Kbytes
• Pin Count: 48
• Max. Operating Frequency: 55 MHz
• Cpu: ARM7TDMI
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 21
• Ext Interrupts: 21
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Uart: 2
• Ssc: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 384
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 4
• Self Program Memory: NO
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8/3.3
• Operating Voltage (vcc): 3.0 to 3.6
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 3
• Output Compare Channels: 3
• Input Capture Channels: 3
• Pwm Channels: 4
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: No

31.6.3.4
368
SAM7S Series
Receiver Operations
OVRE
XRDY
_RHR
S_CR
Clock
Read
Write
Figure 31-12. 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.
Figure 31-13. Receiver Status
Rate
RXD
Example: 8-bit, Parity Enabled 1 Stop
Baud Rate
Sampling
Start
Clock
RXD
Bit
D0
D1
Start
D2
D3
D4
D0
D5
D6
D1
D7
Parity
Bit
D2
Stop
Bit
Start
D3
Bit
D0
D4
D1
D2
D5
D3
D4
D6
D5
D6
D7
D7
Parity
Bit
Parity Bit
6175L–ATARM–28-Jul-11
Stop
Bit
RSTSTA = 1
Stop Bit