M55800A Atmel Corporation, M55800A Datasheet - Page 135

• Manufacturer Part Number: M55800A
• Manufacturer: Atmel Corporation

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

18.1
Table 18-1.
Notes:
1745F–ATARM–06-Sep-07
Name
SCK
RXD
TXD
Pin Description
1. After a hardware reset, the USART clock is disabled by default. The user must configure the Power Management Controller
2. After a hardware reset, the USART pins are deselected by default (see
before any access to the User Interface of the USART.
113). The user must configure the PIO Controller before enabling the transmitter or receiver. If the user selects one of the
internal clocks, SCK can be configured as a PIO.
Description
USART Serial clock can be configured as input or output:
SCK is configured as input if an External clock is selected (USCLKS[1] = 1)
SCK is driven as output if the External Clock is disabled (USCLKS[1] = 0) and Clock output is enabled (CLKO = 1)
Transmit Serial Data is an output
Receive Serial Data is an input
USART Channel External Signals
Section 16. “PIO: Parallel I/O Controller” on page
AT91M5880A
135