SAM7L128 Atmel Corporation, SAM7L128 Datasheet - Page 432
SAM7L128
Manufacturer Part Number
SAM7L128
Description
Manufacturer
Atmel Corporation
Specifications of SAM7L128
Flash (kbytes)
128 Kbytes
Pin Count
144
Max. Operating Frequency
36 MHz
Cpu
ARM7TDMI
Hardware Qtouch Acquisition
No
Max I/o Pins
80
Ext Interrupts
80
Usb Speed
No
Usb Interface
No
Spi
1
Twi (i2c)
1
Uart
3
Segment Lcd
40
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
4
Adc Resolution (bits)
10
Adc Speed (ksps)
460
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
6
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
1.8/3.3
Operating Voltage (vcc)
1.8 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
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Figure 31-11. WAVSEL = 01 Without Trigger
Figure 31-12. WAVSEL = 01 With Trigger
31.5.11.4
432
Waveform Examples
Waveform Examples
0xFFFF
0xFFFF
AT91SAM7L128/64 Preliminary
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
31-14.
Counter incremented
by trigger
6257A–ATARM–20-Feb-08
Figure
Time
Time
31-13.
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