M55800A Atmel Corporation, M55800A Datasheet - Page 22

• 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

Peripheral Signals
USART Signals
22
AT91M55800A
The inputs must meet the minimum pulse width and period constraints shown in Table
29 and Table 30, and represented in Figure 8.
Table 29. USART Input Minimum Pulse Width
Table 30. USART Minimum Input Period
Figure 8. USART Signals
RXD
SCK
Symbol
US
Symbol
US
1
2
Parameter
SCK/RXD Minimum Pulse Width
Parameter
SCK Minimum Input Period
US
1
US
1
Min Input Period
Min Pulse Width
9(t
5(t
US
CPMCK
CPMCK
2
/2)
/2)
1727E–ATARM–01/04
Units
Units
ns
ns