SAM9G25 Atmel Corporation, SAM9G25 Datasheet - Page 166

• Manufacturer Part Number: SAM9G25
• Manufacturer: Atmel Corporation

Specifications of SAM9G25

• Flash (kbytes): 0 Kbytes
• Pin Count: 247
• Max. Operating Frequency: 400 MHz
• Cpu: ARM926
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 105
• Ext Interrupts: 105
• Usb Transceiver: 3
• Usb Speed: Hi-Speed
• Usb Interface: Host, Device
• Spi: 2
• Twi (i2c): 3
• Uart: 7
• Lin: 4
• Ssc: 1
• Ethernet: 1
• Sd / Emmc: 2
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: Yes
• Adc Channels: 12
• Adc Resolution (bits): 10
• Adc Speed (ksps): 440
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 32
• Self Program Memory: NO
• External Bus Interface: 1
• Dram Memory: DDR2/LPDDR, SDRAM/LPSDR
• Nand Interface: Yes
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8/3.3
• Operating Voltage (vcc): 0.9 to 1.1
• Fpu: No
• Mpu / Mmu: No/Yes
• Timers: 6
• Output Compare Channels: 6
• Input Capture Channels: 6
• Pwm Channels: 4
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: No

Figure 18-2. Shutdown Controller Block Diagram
18.4
Table 18-1.
18.5
18.5.1
18.6
166
166
Name
WKUP0
SHDN
WKUP0
RTC Alarm
I/O Lines Description
Product Dependencies
Functional Description
SAM9G25
SAM9G25
Power Management
I/O Lines Description
Shutdown Controller
RTTWKEN
WKMODE0
SHDW_MR
CPTWK0
The Shutdown Controller is continuously clocked by Slow Clock. The Power Management Con-
troller has no effect on the behavior of the Shutdown Controller.
The Shutdown Controller manages the main power supply. To do so, it is supplied with VDDBU
and manages wake-up input pins and one output pin, SHDN.
A typical application connects the pin
viding the main power supplies of the system, and especially VDDCORE and/or VDDIO. The
wake-up inputs (WKUP0) connect to any push-buttons or signal that wake up the system.
The software is able to control the pin
(SHDW_CR) with the bit SHDW at 1. The shutdown is taken into account only 2 slow clock
cycles after the write of SHDW_CR. This register is password-protected and so the value written
Description
Wake-up 0 input
Shutdown output
SHDW_MR
reset
reset
set
read SHDW_SR
read SHDW_SR
WAKEUP0
RTCWK
set
SHDW_SR
SHDW_SR
SHDN
SHDN
to the shutdown input of the DC/DC Converter pro-
by writing the Shutdown Control Register
SHDW_CR
SLCK
SHDW
Wake-up
Shutdown
Shutdown
Controller
Output
11032A–ATARM–27-Jul-11
11032A–ATARM–27-Jul-11
Type
Input
Output
SHDN