M42800A Atmel Corporation, M42800A Datasheet - Page 149
M42800A
Manufacturer Part Number
M42800A
Description
Manufacturer
Atmel Corporation
Datasheets
1.M40800.pdf
(284 pages)
2.M40800.pdf
(153 pages)
3.M42800A.pdf
(224 pages)
4.M42800A.pdf
(27 pages)
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
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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
149
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