SAM4S16C Atmel Corporation, SAM4S16C Datasheet - Page 296

• Manufacturer Part Number: SAM4S16C
• Manufacturer: Atmel Corporation

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

15.6.2
Name:
Address:
Access:
• HRMOD: 12-/24-hour Mode
0 = 24-hour mode is selected.
1 = 12-hour mode is selected.
• PERSIAN: PERSIAN Calendar
0 = Gregorian Calendar.
1 = Persian Calendar.
• NEGPPM: NEGative PPM Correction
0 = positive correction (the divider will be slightly lower than 32768).
1 = negative correction (the divider will be slightly higher than 32768).
Refer to CORRECTION and HIGHPPM field descriptions.
• CORRECTION:
0 = No correction
1..127 = The slow clock will be corrected according to the formula given below in HIGHPPM description.
• HIGHPPM: HIGH PPM Correction
0 = lower range ppm correction with accurate correction.
1 = higher range ppm correction with accurate correction.
If the absolute value of the correction to be applied is lower than 30ppm, it is recommended to clear HIGHPPM. HIGHPPM
set to 1 is recommended for 30 ppm correction and above.
Formula:
296
296
HIGHPPM
If HIGHPPM = 0, then the clock frequency correction range is from 1.5 ppm up to 98 ppm with less than 1 ppm step in
range from 1.5 ppm up to 30 ppm.
The correction field must be programmed according to the required correction in ppm, the formula is as follows:
31
23
15
–
–
7
–
SAM4S
SAM4S
RTC Mode Register
CORRECTION
30
22
14
RTC_MR
0x400E1464
Read-write
–
6
–
=
3906
------------ - 1
ppm
OUT1
29
21
13
5
–
–
TPERIOD
NEGPPM
28
20
12
4
CORRECTION
27
19
11
–
–
–
3
26
18
10
2
–
PERSIAN
THIGH
OUT0
25
17
9
1
11100A–ATARM–28-Oct-11
11100A–ATARM–28-Oct-11
HRMOD
24
16
8
0