SAM3S1A Atmel Corporation, SAM3S1A Datasheet - Page 850

• Manufacturer Part Number: SAM3S1A
• Manufacturer: Atmel Corporation

Specifications of SAM3S1A

• Flash (kbytes): 64 Kbytes
• Pin Count: 48
• Max. Operating Frequency: 64 MHz
• Cpu: Cortex-M3
• # Of Touch Channels: 17
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 34
• Ext Interrupts: 34
• Usb Transceiver: 1
• Quadrature Decoder Channels: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 2
• Twi (i2c): 2
• Uart: 3
• Ssc: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 12
• Adc Speed (ksps): 1000
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 16
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: Yes
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8/3.3
• Operating Voltage (vcc): 1.62 to 3.6
• Fpu: No
• Mpu / Mmu: Yes / No
• Timers: 3
• Output Compare Channels: 3
• Input Capture Channels: 3
• Pwm Channels: 4
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

36.6.2
36.6.2.1
Figure 36-3. Functional View of the Channel Block Diagram
850
Peripheral Bus
Generator
from APB
Clock
from
z = 0 (x = 0, y = 1),
z = 1 (x = 2, y = 3),
z = 2 (x = 4, y = 5),
z = 3 (x = 6, y = 7)
SAM3S
PWM Channel
Block Diagram
Selector
Clock
2-bit gray
counter z
Each of the 4 channels is composed of six blocks:
• A clock selector which selects one of the clocks provided by the clock generator (described in
• A counter clocked by the output of the clock selector. This counter is incremented or
• A comparator used to compute the OCx output waveform according to the counter value and
• A 2-bit configurable gray counter enables the stepper motor driver. One gray counter drives 2
• A dead-time generator providing two complementary outputs (DTOHx/DTOLx) which allows
• An output override block that can force the two complementary outputs to a programmed
• An asynchronous fault protection mechanism that has the highest priority to override the two
Section 36.6.1 on page
decremented according to the channel configuration and comparators matches. The size of
the counter is 16 bits.
the configuration. The counter value can be the one of the channel counter or the one of the
channel 0 counter according to SYNCx bit in the
page 888
channels.
to drive external power control switches safely.
value (OOOHx/OOOLx).
complementary outputs in case of fault detection (PWMHx/PWMLx).
Duty-Cycle
Channel x
Channel 0
Counter
Update
Counter
Period
(PWM_SCM).
MUX
Comparator
Comparator
SYNCx
848).
x
y
OCx
OCy
Dead-Time
Dead-Time
Generator
Generator
“PWM Sync Channels Mode Register” on
Channel y (= x+1)
DTOHx
DTOLx
DTOHy
DTOLy
Channel x
Override
Override
Output
Output
OOOHx
OOOLx
OOOHy
OOOLy
Protection
Protection
6500C–ATARM–8-Feb-11
Fault
Fault
PWMHx
PWMLx
PWMHy
PWMLy