SAM7X256 Atmel Corporation, SAM7X256 Datasheet - Page 402

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SAM7X256

Manufacturer Part Number
SAM7X256
Description
Manufacturer
Atmel Corporation
Datasheets

Specifications of SAM7X256

Flash (kbytes)
256 Kbytes
Pin Count
100
Max. Operating Frequency
55 MHz
Cpu
ARM7TDMI
Hardware Qtouch Acquisition
No
Max I/o Pins
62
Ext Interrupts
62
Usb Transceiver
1
Usb Speed
Full Speed
Usb Interface
Device
Spi
2
Twi (i2c)
1
Uart
3
Can
1
Ssc
1
Ethernet
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
8
Adc Resolution (bits)
10
Adc Speed (ksps)
384
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
64
Self Program Memory
NO
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
3.3
Operating Voltage (vcc)
3.0 to 3.6
Fpu
No
Mpu / Mmu
no / no
Timers
3
Output Compare Channels
3
Input Capture Channels
3
Pwm Channels
4
32khz Rtc
Yes
Calibrated Rc Oscillator
No
Figure 32-11. WAVSEL = 01 Without Trigger
Figure 32-12. WAVSEL = 01 With Trigger
32.5.11.4
402
Waveform Examples
Waveform Examples
0xFFFF
0xFFFF
SAM7X512/256/128
Counter Value
R
R
R
TIOB
TIOA
Counter Value
TIOB
TIOA
R
R
R
C
B
A
WAVSEL = 11
C
B
A
When WAVSEL = 11, the value of TC_CV is incremented from 0 to RC. Once RC is reached, the
value of TC_CV is decremented to 0, then re-incremented to RC and so on. See
A trigger such as an external event or a software trigger can modify TC_CV at any time. If a trig-
ger occurs while TC_CV is incrementing, TC_CV then decrements. If a trigger is received while
TC_CV is decrementing, TC_CV then increments. See
RC Compare can stop the counter clock (CPCSTOP = 1) and/or disable the counter clock (CPC-
DIS = 1).
Counter decremented by compare match with 0xFFFF
Counter decremented by compare match with 0xFFFF
Counter decremented
by trigger
Figure
32-14.
Counter incremented
by trigger
6120I–ATARM–06-Apr-11
Figure
Time
Time
32-13.

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