SAM7S16 Atmel Corporation, SAM7S16 Datasheet - Page 496

• Manufacturer Part Number: SAM7S16
• Manufacturer: Atmel Corporation

Specifications of SAM7S16

• Flash (kbytes): 16 Kbytes
• Pin Count: 48
• Max. Operating Frequency: 55 MHz
• Cpu: ARM7TDMI
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 21
• Ext Interrupts: 21
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Uart: 2
• Ssc: 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): 4
• Self Program Memory: NO
• 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): 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

34.6.12
Register Name:
Access Type:
• CNT: Channel Counter Register
Internal counter value. This register is reset when:
34.6.13
Register Name:
Access Type:
This register acts as a double buffer for the period or the duty cycle. This prevents an unexpected waveform when modify-
ing the waveform period or duty-cycle.
Only the first 16 bits (internal channel counter size) are significant.
496
• the channel is enabled (writing CHIDx in the PWM_ENA register).
• the counter reaches CPRD value defined in the PWM_CPRDx register if the waveform is left aligned.
CPD (PWM_CMRx Register)
31
23
15
31
23
15
7
7
SAM7S Series
PWM Channel Counter Register
PWM Channel Update Register
0
1
30
22
14
30
22
14
6
6
PWM_CCNT[0..X-1]
Read-only
PWM_CUPD[0..X-1]
Write-only
The duty-cycle (CDTC in the PWM_CDRx register) is updated with the CUPD value at the
beginning of the next period.
The period (CPRD in the PWM_CPRx register) is updated with the CUPD value at the beginning
of the next period.
29
21
13
29
21
13
5
5
28
20
12
28
20
12
4
4
CUPD
CUPD
CUPD
CUPD
CNT
CNT
CNT
CNT
27
19
11
27
19
11
3
3
26
18
10
26
18
10
2
2
25
17
25
17
9
1
9
1
6175L–ATARM–28-Jul-11
24
16
24
16
8
0
8
0