SAM7L128 Atmel Corporation, SAM7L128 Datasheet - Page 501
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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34.5.4
Figure 34-9. Memory Management
34.5.5
6257A–ATARM–20-Feb-08
COM0 time slot
COM1 time slot
COM2 time slot
SLCDC memory
Display Features
COM0
COM1
COM2
When a bit in the display memory (SLDC_MEM) is written to one, the corresponding segment is
energized (on), and non-energized when a bit in the display memory is written to zero.
At the beginning of each common, the display buffer is updated. The value of the previous com-
mon is latched in the display memory (it’s value is transferred from the user buffer to the frame
buffer).
The advantages of this solution are:
In order to improve the flexibility of SLCDC the following set of display modes are embedded:
• Ability to access the user buffer at any time in the frame, in any display mode and even in low
• Ability to change only one pixel without reloading the picture
1. Force Mode Off: All pixels are turned off and the memory content is kept.
2. Force Mode On: All pixels are turned on and the memory content is kept.
3. Inverted Mode: All pixels are set in the inverted state as defined in SLCDC memory and
4. Two Blinking Modes:
5. Buffer Swap Mode: All pixels are alternatively assigned to the state defined in the user
power waveform
loaded from the usr buff
Display data previously
the memory content is kept.
– Standard Blinking Mode: All pixels are alternately turned off to the predefined state
– Inverted Blinking Mode: All pixels are alternately turned off to the predefined
buffer then to the state defined in the display buffer.
to the disp buff
in SLCDC memory at LCDBLKFREQ frequency.
opposite state in SLCDC memory at LCDBLKFREQ frequency.
loaded from the usr buff
Display data previously
usr buff to the disp buff
Load data from the
to the disp buff
AT91SAM7L128/64 Preliminary
loaded from the usr buff
usr buff to the disp buff
Display data previously
Load data from the
to the disp reg
usr buff = user buffer
disp buf = display buffer
usr buff to the disp buff
Load data from the
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