SAM7L128 Atmel Corporation, SAM7L128 Datasheet - Page 499

• 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

34.5.2.5
Figure 34-7.
34.5.2.6
6257A–ATARM–20-Feb-08
-
-
2
1
2
1
2
1
1
2
/
/
/
/
/
/
/
/
3
3
3
3
3
3
3
3
-V
V
V
V
V
V
V
V
V
V
V
V
GND
GND
GND
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
Low Power Waveform
Frame Rate
Default and Low Power Waveform
Frame
To reduce toggle activity and hence power consumption, a low power waveform can be selected
by writing LPMODE to one. The default and low power waveform is shown in
duty and 1/3 bias. For other selections of duty and bias, the effect is similar.
Note:
The Frame Rate register (SLCDC_FRR) enables the generation of the frequency used by the
SLCD Controller. It is done by a prescaler (division by 8, 16, 32, 64, 128, 256, 512 and 1024) fol-
lowed by a finer divider (division by 1, 2, 3, 4, 5, 6, 7 or 8).
To calculate the proper frame frequency needed, the equation below must be taken into
account:
Where:
f
f
PRES = prescaler value (8, 16, 32, 64, 128, 256, 512 or 1024)
DIV = divider value (1, 2, 3, 4, 5, 6, 7, or 8)
NCOM = depends of number of commons and is defined in
SCLK
frame
= frame frequency
= slow clock frequency
Frame
Refer to the LCD specification to verify that low power waveforms are supported.
SEG0
COM0
SEG0 - COM0
f
frame
AT91SAM7L128/64 Preliminary
-
-
2
1
2
1
2
1
1
2
/
/
/
/
/
/
/
/
3
3
3
3
3
3
3
3
-V
=
V
V
V
V
V
V
V
V
V
V
V
GND
GND
GND
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
--------------------------------------------------------- -
(
PRES DIV NCOM
⋅
Frame
fSCLK
⋅
Table 34-3
Frame
)
below:
SEG0
COM0
SEG0 - COM0
Figure 34-7
for 1/3
499