SAM7L128 Atmel Corporation, SAM7L128 Datasheet - Page 494
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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Functional Description
AT91SAM7L128/64 Preliminary
After the initialization sequence the SLCDCC is ready to be enabled in order to enter the display
phase (where it is possible to do more than display data written in the SLCDC memory) up to the
disable sequence.
There are two ways to disable the SLCDC
• Initialization Sequence:
1. Select the LCD supply source in the shutdown controller
2. Select the clock division (SLDCD_FRR) to use a proper frame rate
3. Enter the number of common and segments terminals (SLDCD_MR)
4. Select the bias in compliance with the LCD manufacturer data sheet
5. Enter buffer driving time
• During the Display Phase:
1. Data may be written at any time in the SLCDC memory, they are automatically latched
2. It is possible to:
• Disable Sequence:
1. By using the LCDDIS (LCD Disable) bit. (In this case, SLCDC configuration and mem-
2. Or by using the SWRST (Software Reset) bit.
– Internal: The on chip charge pump is selected,
– External: the external supply source has to be between 2 and 3.4 V
and displayed at the next LCD frame
– Adjust contrast
– Adjust the frame frequency
– Adjust buffer driving time
– Reduce the SLCDC consumption by entering in low-power waveform at any time
– Use the large set of display features such as blinking, inverted blink, etc.
ory content are kept.)
6257A–ATARM–20-Feb-08
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