SAM7L128 Atmel Corporation, SAM7L128 Datasheet - Page 494

• 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

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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