M42800A Atmel Corporation, M42800A Datasheet - Page 40

• 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

40
AT91M42800A
Figures 11-21 through 11-27 show the timing cycles and wait states for read and write access
to the various AT91M42800A external memory devices. The configurations described are
shown in the following table:
Table 11-3.
Figure Number
11-21
11-22
11-23
11-24
11-25
11-26
11-27
Memory Access Waveforms
Number of Wait States
0
1
1
0
1
1
0
Bus Width
16
16
16
16
8
8
8
Size of Data Transfer
Half-word
Half-word
Word
Word
Word
Byte
Byte
1779D–ATARM–14-Apr-06