SAM7L128 Atmel Corporation, SAM7L128 Datasheet - Page 215
SAM7L128
Manufacturer Part Number
SAM7L128
Description
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
- Current page: 215 of 564
- Download datasheet (9Mb)
24.5
24.5.1
6257A–ATARM–20-Feb-08
Main Clock
2 MHz Fast RC Oscillator
Figure 24-3
Figure 24-3. Main Clock Block Diagram
The Main Clock has two sources:
After reset, the 2 MHz Fast RC Oscillator is enabled and selected as MAINCK. MAINCK is the
default clock selected to start up the system.
Startup-up time specifications are provided in the “DC Characteristics” section of the product
datasheet.
The software can disable or enable the 2 MHz Fast RC Oscillator with the MAINCKON bit in the
Clock Generator Main Oscillator Register (CKGR_MOR).
When disabling the Main Clock by clearing the MAINCKON bit in CKGR_MOR, the MAINRDY
bit in the Power Management Controller Status Register (PMC_SR) is automatically cleared,
indicating the Main Clock is off.
Setting the MAINRDY bit in the Power Management Controller Interrupt Enable Register
(PMC_IER) can trigger an interrupt to the processor.
It is recommended to disable the Main Clock as soon as the processor no longer uses it and
runs out of SLCK or PLLCK.
Disabling the MAINCKON bit is also used to go into WAIT mode. The user sets the Main Clock
as Master clock and disables the Main Clock by clearing the MAINCKON bit.
To wake up from WAIT mode, a fast startup must be done. See
• 2 MHz Fast RC Oscillator which starts very quickly and is used at startup
• an external clock (CLKIN)
shows the Main Clock block diagram.
CLKIN
Slow Clock
SLCK
Embedded
2 MHz RC
Oscillator
MAINCKON
AT91SAM7L128/64 Preliminary
Main Clock
MAINCKON
Frequency
MCKSEL
Counter
1
0
MAINCKON
Section 25.6 ”The Fast
Main Clock
MAINCK
MAINRDY
MAINSELS
MAINFRDY
MAINF
Startup”.
215
Related parts for SAM7L128
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
INTERVAL AND WIPE/WASH WIPER CONTROL IC WITH DELAY
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Low-Voltage Voice-Switched IC for Hands-Free Operation
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
MONOLITHIC INTEGRATED FEATUREPHONE CIRCUIT
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
AM-FM Receiver IC U4255BM-M
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Monolithic Integrated Feature Phone Circuit
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Multistandard Video-IF and Quasi Parallel Sound Processing
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
High-performance EE PLD
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
8-bit Flash Microcontroller
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
2-Wire Serial EEPROM
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
U6046BREAR WINDOW HEATING TIMER / LONG-TERM TIMER
Manufacturer:
ATMEL Corporation
Datasheet: