M42800A Atmel Corporation, M42800A Datasheet - Page 134

• Manufacturer Part Number: M42800A
• Manufacturer: Atmel Corporation

Specifications of M42800A

• Flash (kbytes): 0 Kbytes
• Pin Count: 144
• Max. Operating Frequency: 33 MHz
• Cpu: ARM7TDMI
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 54
• Ext Interrupts: 54
• Usb Speed: No
• Usb Interface: No
• Spi: 2
• Uart: 2
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 8
• Self Program Memory: NO
• External Bus Interface: 1
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 3.3/5.0
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 6
• Output Compare Channels: 6
• Input Capture Channels: 6
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: No

The interpretation of the number of stop bits depends on SYNC.
Note:
• CHMODE: Channel Mode
• MODE9: 9-Bit Character Length (Code Label US_MODE9)
0 = CHRL defines character length.
1 = 9-Bit character length.
• CKLO: Clock Output Select (Code Label US_CLKO)
0 = The USART does not drive the SCK pin.
1 = The USART drives the SCK pin.
134
0
0
1
1
0
0
1
1
CHMODE
NBSTOP
1.5 or 2 stop bits are reserved for the TX function. The RX function uses only the 1 stop bit (there is no check on the 2 stop bit
timeslot if NBSTO P= 10).
AT91M42800A
0
1
0
1
0
1
0
1
Mode Description
Normal Mode
The USART Channel operates as an Rx/Tx USART.
Automatic Echo
Receiver Data Input is connected to TXD pin.
Local Loopback
Transmitter Output Signal is connected to Receiver Input Signal.
Remote Loopback
RXD pin is internally connected to TXD pin.
Asynchronous (SYNC = 0)
1 stop bit
1.5 stop bits
2 stop bits
Reserved
Synchronous (SYNC = 1)
1 stop bit
Reserved
2 stop bits
Reserved
Code Label: US_CHMODE
US_CHMODE_NORMAL
US_CHMODE_AUTOMATIC_ECHO
US_CHMODE_LOCAL_LOOPBACK
US_CHMODE_REMOTE_LOOPBACK
Code Label: US_NBSTOP
US_NBSTOP_1
US_NBSTOP_1_5
US_NBSTOP_2
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1779D–ATARM–14-Apr-06