SAM4S16C Atmel Corporation, SAM4S16C Datasheet - Page 921

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SAM4S16C

Manufacturer Part Number
SAM4S16C
Description
Manufacturer
Atmel Corporation
Datasheets

Specifications of SAM4S16C

Flash (kbytes)
1024 Kbytes
Pin Count
100
# Of Touch Channels
32
Hardware Qtouch Acquisition
No
Max I/o Pins
79
Ext Interrupts
79
Usb Transceiver
1
Quadrature Decoder Channels
2
Usb Speed
Full Speed
Usb Interface
Device
Spi
3
Twi (i2c)
2
Uart
4
Ssc
1
Sd / Emmc
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
16
Adc Resolution (bits)
12
Adc Speed (ksps)
1000
Analog Comparators
1
Resistive Touch Screen
No
Dac Channels
2
Dac Resolution (bits)
12
Temp. Sensor
Yes
Crypto Engine
No
Sram (kbytes)
128
Self Program Memory
YES
External Bus Interface
1
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
6
Output Compare Channels
6
Input Capture Channels
6
Pwm Channels
4
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
36.6.5.4
11100A–ATARM–28-Oct-11
11100A–ATARM–28-Oct-11
Changing the Synchronous Channels Update Period
Figure 36-17. Synchronized Period, Duty-Cycle and Dead-Times Update
It is possible to change the update period of synchronous channels while they are enabled. (See
“Method 2: Manual write of duty-cycle values and automatic trigger of the update” on page 912
and
page
To prevent an unexpected update of the synchronous channels registers, the user must use the
“PWM Sync Channels Update Period Update Register”
update period of synchronous channels while they are still enabled. This register holds the new
value until the end of the update period of synchronous channels (when UPRCNT is equal to
UPR in
rent PWM period, then updates the value for the next period.
Note:
Note:
“Method 3: Automatic write of duty-cycle values and automatic trigger of the update” on
- If Asynchronous Channel
- If Synchronous Channel
913.)
-> End of PWM period
-> End of PWM period and UPDULOCK = 1
“PWM Sync Channels Update Period Register”
If the update register PWM_SCUPUPD is written several times between two updates, only the last
written value is taken into account.
Changing the update period does make sense only if there is one or more synchronous channels
and if the update method 1 or 2 is selected (UPDM = 1 or 2 in
ter”
).
PWM_DTUPDx Value
User's Writing
PWM_DTx
- If Asynchronous Channel
- If Synchronous Channel
-> End of PWM period
- If UPDM = 0
- If UPDM = 1 or 2
-> End of PWM period and UPDULOCK = 1
-> End of PWM period and end of Update Period
PWM_CPRDUPDx Value
PWM_CPRDx
User's Writing
(PWM_SCUP)) and the end of the cur-
(PWM_SCUPUPD) to change the
“PWM Sync Channels Mode Regis-
PWM_CDTYUPDx Value
PWM_CDTYx
User's Writing
SAM4S
SAM4S
921
921

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