M55800A Atmel Corporation, M55800A Datasheet - Page 155
M55800A
Manufacturer Part Number
M55800A
Description
Manufacturer
Atmel Corporation
Datasheets
1.M40800.pdf
(284 pages)
2.M40800.pdf
(153 pages)
3.M55800A.pdf
(29 pages)
4.M55800A.pdf
(256 pages)
5.M55800A.pdf
(28 pages)
Specifications of M55800A
Flash (kbytes)
0 Kbytes
Pin Count
176
Max. Operating Frequency
33 MHz
Cpu
ARM7TDMI
Hardware Qtouch Acquisition
No
Max I/o Pins
58
Ext Interrupts
58
Usb Speed
No
Usb Interface
No
Spi
1
Uart
3
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
8
Adc Resolution (bits)
10
Adc Speed (ksps)
72
Resistive Touch Screen
No
Dac Channels
1
Dac Resolution (bits)
10
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
- M40800 PDF datasheet
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- M55800A PDF datasheet #3
- M55800A PDF datasheet #4
- M55800A PDF datasheet #5
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18.10.6
Name:
Access Type:
Reset:
Offset:
• RXRDY: Receiver Ready (Code Label US_RXRDY)
0 = No complete character has been received since the last read of the US_RHR or the receiver is disabled.
1 = At least one complete character has been received and the US_RHR has not yet been read.
• TXRDY: Transmitter Ready (Code Label US_TXRDY)
0 = US_THR contains a character waiting to be transferred to the Transmit Shift Register, or an STTBRK command has
been requested.
1 = US_THR is empty and there is no Break request pending TSR availability.
Equal to zero when the USART is disabled or at reset. Transmitter Enable command (in US_CR) sets this bit to one.
• RXBRK: Break Received/End of Break (Code Label US_RXBRK)
0 = No Break Received nor End of Break detected since the last “Reset Status Bits” command in the Control Register.
1 = Break Received or End of Break detected since the last “Reset Status Bits” command in the Control Register.
• ENDRX: End of Receive Transfer (Code Label US_ENDRX)
0 = The End of Transfer signal from the Peripheral Data Controller channel dedicated to the receiver is inactive.
1 = The End of Transfer signal from the Peripheral Data Controller channel dedicated to the receiver is active.
• ENDTX: End of Transmit Transfer (Code Label US_ENDTX)
0 = The End of Transfer signal from the Peripheral Data Controller channel dedicated to the transmitter is inactive.
1 = The End of Transfer signal from the Peripheral Data Controller channel dedicated to the transmitter is active.
• OVRE: Overrun Error (Code Label US_OVRE)
0 = No byte has been transferred from the Receive Shift Register to the US_RHR when RxRDY was asserted since the last
“Reset Status Bits” command.
1 = At least one byte has been transferred from the Receive Shift Register to the US_RHR when RxRDY was asserted
since the last “Reset Status Bits” command.
• FRAME: Framing Error (Code Label US_FRAME)
0 = No stop bit has been detected low since the last “Reset Status Bits” command.
1 = At least one stop bit has been detected low since the last “Reset Status Bits” command.
1745F–ATARM–06-Sep-07
PARE
31
23
15
–
–
–
7
USART Channel Status Register
FRAME
US_CSR
Read-only
0x18
0x14
30
22
14
–
–
–
6
OVRE
29
21
13
–
–
–
5
ENDTX
28
20
12
–
–
–
4
ENDRX
27
19
11
–
–
–
3
RXBRK
26
18
10
–
–
–
2
TXEMPTY
TXRDY
AT91M5880A
25
17
–
–
9
1
TIMEOUT
RXRDY
24
16
–
–
8
0
155
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