PCF8820U Philips Semiconductors, PCF8820U Datasheet - Page 29

• Manufacturer Part Number: PCF8820U
• Description: 67 x 101 Grey-scale/ECB colour dot matrix LCD driver
• Manufacturer: Philips Semiconductors

Philips Semiconductors
2000 Dec 07
handbook, full pagewidth
handbook, full pagewidth
f frame
f frame
67 101 Grey-scale/ECB colour dot matrix
LCD driver
(Hz)
t
(Hz)
f
cal
clk
= 190 s.
= 336 kHz.
100
110
100
95
90
85
80
75
70
65
60
90
80
70
60
50
40
30
20
10
150
100
1:3
Fig.21 Calibrated frame frequency as a function of clock frequency and pre-divider ratio.
150
200
Fig.22 Frame frequency as a function of the calibration time and pre-divider ratio.
1:2
1:4
200
250
1:5
250
1:3
300
1:6
300
1:7
350
350
1:4
1:8
400
400
1:9
29
450
450
1:10
1:5
500
500
1:11
550
1:12
550
1:6
600
1:13
600
650
1:7
1:14
650
f clk (kHz)
700
t cal ( s)
1:15
Product specification
700
750
PCF8820
1:8
MGT129
MGT130
750
800