M55800A Atmel Corporation, M55800A Datasheet - Page 28

• 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

Introduction
1-6
Thumb therefore offers a long branch range, powerful arithmetic operations, and a large
address space.
Thumb code is typically 65% of the size of ARM code, and provides 160% of the
performance of ARM code when running from a 16-bit memory system. Thumb,
therefore, makes the ARM7TDMI core ideally suited to embedded applications with
restricted memory bandwidth, where code density and footprint is important.
The availability of both 16-bit Thumb and 32-bit ARM instruction sets gives designers
the flexibility to emphasize performance or code size on a subroutine level, according
to the requirements of their applications. For example, critical loops for applications
such as fast interrupts and DSP algorithms can be coded using the full ARM instruction
set then linked with Thumb code.
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