SAM4S16C Atmel Corporation, SAM4S16C Datasheet - Page 237

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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
11.10.1.4
Name:
Access:
Reset:
The SysTick SYST_CSR register indicates the SysTick calibration properties.
• NOREF: No Reference Clock
It indicates whether the device provides a reference clock to the processor:
0: Reference clock provided.
1: No reference clock provided.
If your device does not provide a reference clock, the SYST_CSR.CLKSOURCE bit reads-as-one and ignores writes.
• SKEW
It indicates whether the TENMS value is exact:
0: TENMS value is exact.
1: TENMS value is inexact, or not given.
An inexact TENMS value can affect the suitability of SysTick as a software real time clock.
• TENMS: Ten Milliseconds
The reload value for 10 ms (100 Hz) timing is subject to system clock skew errors. If the value reads as zero, the calibration
value is not known.
Read as 0x000030D4. The SysTick calibration value is fixed at
base of 1 ms with SysTick clock at
11100A–ATARM–28-Oct-11
11100A–ATARM–28-Oct-11
NOREF
23
15
31
7
SysTick Calibration Value Register
SYST_CALIB
Read-write
0x000000000
SKEW
22
14
30
6
12.5 MHz (100/8 = 12.5 MHz).
29
21
13
5
20
12
28
4
TENMS
TENMS
TENMS
0x000030D4
19
11
27
3
(12500), which allows the generation of a time
26
18
10
2
25
17
9
1
SAM4S
SAM4S
24
16
8
0
237
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