pcf85132 NXP Semiconductors, pcf85132 Datasheet - Page 28

• Manufacturer Part Number: pcf85132
• Description: Pcf85132 Lcd Driver For Low Multiplex Rates
• Manufacturer: NXP Semiconductors

NXP Semiconductors
PCF85132
Product data sheet
Table 15.
[1]
[2]
[3]
Table 16.
[1]
[2]
Bit
7 to 3
2
1 to 0
Bit
7 to 4
3 to 0
Power-on and reset value.
Normal blinking is assumed when the LCD multiplex drive modes 1:3 or 1:4 are selected.
Alternate RAM bank blinking does not apply in 1:3 and 1:4 multiplex drive modes.
Nominal frame frequency calculated for an internal operating frequency of 1.800 kHz.
Power-on and reset value.
Symbol
-
AB
BF[1:0]
Symbol
F[2:0]
-
Blink-select command bit description
Frame-frequency-prescaler command bit description
All information provided in this document is subject to legal disclaimers.
11110
Value
0
1
00
01
10
11
Value
11101
000
001
010
011
100
101
110
111
Rev. 1 — 23 November 2010
[1]
[1]
[2]
Description
fixed value
blink mode selection
blink frequency selection
Description
Nominal frame frequency
fixed value
defines the division factor for the frame frequency f
60 Hz
65 Hz
70 Hz
75 Hz
80 Hz
85 Hz
90 Hz
75 Hz
normal blinking
alternate RAM bank blinking
off
1
2
3
[2]
LCD driver for low multiplex rates
[1]
[3]
Equation
f
f
f
f
f
f
f
f
fr
fr
fr
fr
fr
fr
fr
fr
=
=
=
=
=
=
=
=
64
----- -
80
64
----- -
74
64
----- -
68
f
------- -
64
----- -
60
64
----- -
56
64
----- -
53
f
------- -
PCF85132
24
24
clk
clk
×
×
×
×
×
×
© NXP B.V. 2010. All rights reserved.
f
------- -
f
------- -
f
------- -
f
------- -
f
------- -
f
------- -
24
24
24
24
24
24
clk
clk
clk
clk
clk
clk
fr
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