Datasheet

76
XMEGA B1 [DATASHEET]
Atmel-8330H-AVR-ATxmega64B1-128B1_datasheet–AVR–12/2014
36.6 Liquid Crystal Display Characteristics
Table 36-8. Liquid Crystal Display Characteristics
Notes: 1. Applies to Static and 1/3 bias.
36.7 ADC Characteristics
Table 36-9. Power Supply, Reference, and Input Range
Table 36-10. Clock and Timing
Symbol Parameter Condition Min. Typ. Max. Units
SEG Segment terminal pins 0 40
COM Common terminal pins 0 4
f
Frame
LCD frame frequency F(clk
LCD
)=32.768kHz 31.25 512 Hz
C
Flying
Flying capacitor 100 nF
Contrast Contrast adjustment -0.5 0 0.5 V
V
LCD
LCD regulated voltages
C
Flying
= 0.1µF
0.1µF on V
LCD
, BIAS2 and
BIAS1 pins
3
VBIAS2 2*V
LCD
/3
BIAS1 V
LCD
/3
R
COM
Common output impedance COM0 to COM3
(1)
0.25 0.5 1
k
R
SEG
Segment output impedance SEG0 to SEG39
(1)
2 4 8
Symbol Parameter Condition Min. Typ. Max. Units
AV
CC
Analog supply voltage V
CC
- 0.3 V
CC
+ 0.3
V
V
REF
Reference voltage 1 AV
CC
- 0.6
R
in
Input resistance Switched 4.5 k
C
in
Input capacitance Switched 5 pF
R
AREF
Reference input resistance (leakage only) >10 M
C
AREF
Reference input capacitance Static load 7 pF
Vin Input range 0 V
REF
V
Vin Conversion range Differential mode, Vinp - Vinn
-
0.95*V
REF
0.95*V
REF
Vin Conversion range Single ended unsigned mode, Vinp
-
0.05*V
REF
0.95*V
REF
Symbol Parameter Condition Min. Typ. Max. Units
Clk
ADC
ADC clock frequency
Maximum is 1/4 of peripheral clock
frequency
100 1800
kHz
Measuring internal signals 125
f
ClkADC
Sample rate 16 300 ksps