SAM4S16C Atmel Corporation, SAM4S16C Datasheet - Page 325

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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
17.4.7.2
11100A–ATARM–28-Oct-11
11100A–ATARM–28-Oct-11
Low Power Debouncer Inputs
32,768 slow clock cycles. This corresponds respectively to about 100 µs, about 1 ms, about
16 ms, about 128 ms and about 1 second (for a typical slow clock frequency of 32 kHz). Pro-
gramming WKUPDBC to 0x0 selects an immediate wake up, i.e., an enabled WKUP pin must be
active according to its polarity during a minimum of one slow clock period to wake up the core
power supply.
If an enabled WKUP pin is asserted for a time longer than the debouncing period, a wake up of
the core power supply is started and the signals, WKUP0 to WKUP15 as shown in
are latched in the Supply Controller Status Register (SUPC_SR). This allows the user to identify
the source of the wake up, however, if a new wake up condition occurs, the primary information
is lost. No new wake up can be detected since the primary wake up condition has disappeared.
It is possible to generate a waveform (RTCOUT0 and RTCOUT1) in all modes (including backup
mode). It can be useful to control an external sensor and/or tampering function without waking
up the processor. Please refer to the RTC section.
Two separate debouncers are embedded for WKUP0 and WKUP1 inputs.
The WKUP0 and/or WKUP1 inputs can be programmed to perform a wake up of the core power
supply with a debouncing done by RTCOUT0. This can be enabled by setting LPDBC0 bit
and/or LPDBC1 bit in SUPC_WUMR.
In this mode of operation, WKUP0 and/or WKUP1 must not be configured to also act as
debouncing source for the WKUPDBC counter (WKUPEN0 and/or WKUPEN1 must be cleared
in SUPC_WUIR). Refer to
This mode of operation requires the RTC Output (RTCOUT0) to be configured to generate a
square waveform (i.e. OUT0 = 0x1, 0x2, 0x3, 0x4 in RTC_MR) in order to create the sampling
points of both debouncers. The sampling point is the falling edge of the RTCOUT0 waveform.
Figure 17-5
RTCOUTO0 powers the external pullup used by the tampers.
Figure 17-5. Low Power Debouncer (with pull-up resistors)
shows an example of an application where two tamper switches are used.
GND
Pull-Up
Resistor
Figure
GND
Pull-Up
Resistor
17-5.
RTCOUT0
WKUP0
WKUP1
AT91SAM
SAM4S
SAM4S
Figure
17-5,
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