SAM7L128 Atmel Corporation, SAM7L128 Datasheet - Page 213

• Manufacturer Part Number: SAM7L128
• Manufacturer: Atmel Corporation

Specifications of SAM7L128

• Flash (kbytes): 128 Kbytes
• Pin Count: 144
• Max. Operating Frequency: 36 MHz
• Cpu: ARM7TDMI
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 80
• Ext Interrupts: 80
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Uart: 3
• Segment Lcd: 40
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 4
• Adc Resolution (bits): 10
• Adc Speed (ksps): 460
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 6
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8/3.3
• Operating Voltage (vcc): 1.8 to 3.6
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 3
• Output Compare Channels: 3
• Input Capture Channels: 3
• Pwm Channels: 4
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: No

24. Clock Generator
24.1
6257A–ATARM–20-Feb-08
Overview
The Clock Generator is made up of one PLL, one fast RC oscillator, one slow RC oscillator and
one 32,768 Hz Crystal Oscillator.
It provides the following clocks:
The Clock Generator User Interface is embedded within the Power Management Controller and
is described in
the Clock Generator registers are named CKGR_.
Figure 24-1. Clock Generator Block Diagram
• SLCK, the Slow Clock, which is the only permanent clock within the system (except in OFF
• MAINCK is the output of the Main Clock selection: either CLKIN (external clock) or 2 MHz
• PLLCK is the output of the Divider and PLL block
mode)
Fast RC Oscillator
Section 25.9 ”Power Management Controller (PMC) User
(Supply Controller)
PLLRC
CLKIN
XOUT
XIN
XTALSEL
Embedded
Xtal 32 kHz
Management
Embedded
32 kHz RC
2 MHz RC
Oscillator
Status
Oscillator
Oscillator
Controller
SLCK
Power
AT91SAM7L128/64 Preliminary
Clock Generator
PLL and
Control
Divider
PLL Clock
PLLCK
Slow Clock
SLCK
MCKSEL
Main Clock
MAINCK
Interface”. However,
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