SAM9RL64 Atmel Corporation, SAM9RL64 Datasheet - Page 255

• Manufacturer Part Number: SAM9RL64
• Manufacturer: Atmel Corporation

Specifications of SAM9RL64

• Flash (kbytes): 0 Kbytes
• Pin Count: 217
• Max. Operating Frequency: 240 MHz
• Cpu: ARM926
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 118
• Ext Interrupts: 118
• Usb Transceiver: 1
• Usb Speed: Hi-Speed
• Usb Interface: Device
• Spi: 1
• Twi (i2c): 2
• Uart: 5
• Ssc: 2
• Sd / Emmc: 1
• Graphic Lcd: Yes
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 6
• Adc Resolution (bits): 10
• Adc Speed (ksps): 220
• Resistive Touch Screen: Yes
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 64
• Self Program Memory: NO
• External Bus Interface: 1
• Dram Memory: sdram
• Nand Interface: Yes
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8/3.3
• Operating Voltage (vcc): 1.08 to 1.32
• Fpu: No
• Mpu / Mmu: No / Yes
• Timers: 3
• Output Compare Channels: 3
• Input Capture Channels: 3
• Pwm Channels: 4
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: No

26. Clock Generator
26.1
26.2
26.3
26.4
6289D–ATARM–3-Oct-11
Description
Slow Clock Crystal Oscillator
Slow Clock RC Oscillator
Slow Clock Selection
The Clock Generator is made up of one PLL, a 12 MHz Main Oscillator, as well as an RC Oscil-
lator and a 32,768 Hz low-power Oscillator.
It provides the following clocks:
The Clock Generator User Interface is embedded within the Power Management Controller one
and is described in
The Clock Generator integrates a 32,768 Hz low-power oscillator. The XIN32 and XOUT32 pins
must be connected to a 32,768 Hz crystal. Two external capacitors must be wired as shown in
Figure
Figure 26-1. Typical Slow Clock Crystal Oscillator Connection
The user has to take into account the possible drifts of the RC Oscillator. More details are given
in the section “DC Characteristics” of the product datasheet.
The AT91SAM9R64/RL64 slow clock can be generated either by an external 32,768 Hz crystal
or by the on-chip RC oscillator. The 32,768 Hz crystal oscillator can be bypassed by setting the
bit OSC32BYP to accept an external slow clock on XIN32.
The internal RC oscillator and the 32,768 Hz oscillator can be enabled by setting to 1, respec-
tively, RCEN bit and OSC32EN bit in the System Controller user interface. The OSCSEL
command selects the slow clock source.
By default the AT91SAM9R64/RL64 slow clock source is the internal RC oscillator. System
startup time is 4 slow clock periods, typically 125 µs.
• SLCK, the Slow Clock, which is the only permanent clock within the system
• MAINCK is the output of the 12 MHz Main Oscillator
• PLLCK is the output of the Divider and PLL block
26-1.
Section
27.8. However, the Clock Generator registers are named CKGR_.
XIN32
32,768 Hz
Crystal
XOUT32
AT91SAM9R64/RL64
GNDPLL
255