SAM4S16C Atmel Corporation, SAM4S16C Datasheet - Page 233
SAM4S16C
Manufacturer Part Number
SAM4S16C
Description
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
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11.10 System Timer (SysTick)
11.10.1
Table 11-33. System Timer (SysTick) Register Mapping
11100A–ATARM–28-Oct-11
11100A–ATARM–28-Oct-11
Offset
0xE000E010
0xE000E014
0xE000E018
0xE000E01C
System Timer (SysTick) User Interface
Register
SysTick Control and Status Register
SysTick Reload Value Register
SysTick Current Value Register
SysTick Calibration Value Register
The processor has a 24-bit system timer, SysTick, that counts down from the reload value to
zero, reloads (wraps to) the value in the SYST_RVR register on the next clock edge, then counts
down on subsequent clocks.
When the processor is halted for debugging, the counter does not decrement.
The SysTick counter runs on the processor clock. If this clock signal is stopped for low power
mode, the SysTick counter stops.
Ensure that the software uses aligned word accesses to access the SysTick registers.
The SysTick counter reload and current value are undefined at reset; the correct initialization
sequence for the SysTick counter is:
1. Program the reload value.
2. Clear the current value.
3. Program the Control and Status register.
Name
SYST_CSR
SYST_RVR
SYST_CVR
SYST_CALIB
Access
Read-write
Read-write
Read-write
Read-only
Reset
0x00000004
Unknown
Unknown
0xC0000000
SAM4S
SAM4S
233
233
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