SAM7L128 Atmel Corporation, SAM7L128 Datasheet - Page 32
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
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32
Clock Generator
AT91SAM7L128/64 Preliminary
BOD current consumption is 25 µA, typically.
To decrease current consumption, the software can disable the brownout detector, especially in
low-power mode.
The software can also configure the BOD in “switched” mode. In this mode, an internal state
machine switches on and off periodically and stores the output of the BOD.
This decreases the current consumption (inferior to 2 µA) while the detection is still active. This
feature is suitable in low-power mode where voltage detection is still needed.
The clock generator embeds one low-power RC oscillator, one fast RC oscillator, one crystal
oscillator and one PLL with the following characteristics:
It provides SLCK, MAINCK and PLLCK.
The Supply Controller selects between the internal RC oscillator and the 32 kHz crystal oscilla-
tor. The unused oscillator is disabled so that power consumption is optimized.
The 2 MHz Fast RC oscillator is the default selected clock (MAINCK) which is used at start-up .
The user can select an external clock (CLKIN) through software.
The PLL needs an external RC filter and starts up in a very short time (inferior to 1 ms).
• RC Oscillator ranges between 22 kHz and 42 kHz
• Fast RC Oscillator ranges between 1.5 MHz and 2.5 MHz
• Crystal Oscillator at 32 kHz (can be bypassed)
• PLL output ranges between 18 MHz and 47 MHz
6257A–ATARM–20-Feb-08
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