M42800A Atmel Corporation, M42800A Datasheet - Page 149

• 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

18. TC: Timer/Counter
1779D–ATARM–14-Apr-06
The AT91M42800A features two Timer/Counter blocks, each containing three identical 16-bit
Timer/Counter channels. Each channel can be independently programmed to perform a wide
range of functions including frequency measurement, event counting, interval measurement,
pulse generation, delay timing and pulse width modulation.
Each Timer/Counter (TC) channel has 3 external clock inputs, 5 internal clock inputs, and 2
multi-purpose input/output signals which can be configured by the user. Each channel drives
an internal interrupt signal which can be programmed to generate processor interrupts via the
AIC (Advanced Interrupt Controller).
The Timer/Counter block has two global registers which act upon all three TC channels. The
Block Control Register allows the three channels to be started simultaneously with the same
instruction. The Block Mode Register defines the external clock inputs for each Timer/Counter
channel, allowing them to be chained.
Each Timer/Counter block operates independently and has a complete set of block and chan-
nel registers. Since they are identical in operation, only one block is described below (see
Timer/Counter Description on page 152). The internal configuration of a single Timer/Counter
Block is shown in Figure 18-1.
AT91M42800A
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