PCF8576C All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
Product data sheet Rev. 13 — 16 December 2013 28 of 62
NXP Semiconductors
PCF8576C
Universal LCD driver for low multiplex rates
7.18.1 Mode-set command
[1] The possibility to disable the display allows implementation of blinking under external control.
[2] Bit B is not applicable for the static LCD drive mode.
7.18.2 Load-data-pointer command
7.18.3 Device-select command
Table 10. Mode-set command bit description
Bit Symbol Value Description
7C0, 1see Figure 20
6 to 5 - 10 fixed value
4LP power dissipation (see Table 7
)
0 normal-power mode
1 power-saving mode
3E display status
0 disabled
[1]
1 enabled
2B LCD bias configuration
[2]
0
1
3
bias
1
1
2
bias
1 to 0 M[1:0] LCD drive mode selection
01 static; BP0
10 1:2 multiplex; BP0, BP1
11 1:3 multiplex; BP0, BP1, BP2
00 1:4 multiplex; BP0, BP1, BP2, BP3
Table 11. Load-data-pointer command bit description
Bit Symbol Value Description
7C0, 1see Figure 20
6 - 0 fixed value
5 to 0 P[5:0] 000000 to
100111
6-bit binary value, 0 to 39; transferred to the data pointer to
define one of forty display RAM addresses
Table 12. Device-select command bit description
Bit Symbol Value Description
7C0, 1see Figure 20
6 to 4 - 1100 fixed value
3 to 0 A[2:0] 000 to 111 3-bit binary value, 0 to 7; transferred to the subaddress
counter to define one of eight hardware subaddresses
PCF8576C All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
Product data sheet Rev. 13 — 16 December 2013 29 of 62
NXP Semiconductors
PCF8576C
Universal LCD driver for low multiplex rates
7.18.4 Bank-select command
[1] The bank-select command has no effect in 1:3 and 1:4 multiplex drive modes.
7.18.5 Blink-select command
[1] Normal blinking is assumed when the LCD multiplex drive modes 1:3 or 1:4 are selected.
[2] Alternate RAM bank blinking does not apply in 1:3 and 1:4 multiplex drive modes.
7.19 Display controller
The display controller executes the commands identified by the command decoder. It
contains the status registers of the PCF8576C and coordinates their effects. The
controller is also responsible for loading display data into the display RAM as required by
the filling order.
Table 13. Bank-select command bit description
Bit Symbol Value Description
Static 1:2 multiplex
[1]
7 C 0, 1 see Figure 20
6 to 2 - 11110 fixed value
1I input bank selection; storage of arriving display data
0 RAM bit 0 RAM bits 0 and 1
1 RAM bit 2 RAM bits 2 and 3
0O output bank selection; retrieval of LCD display data
0 RAM bit 0 RAM bits 0 and 1
1 RAM bit 2 RAM bits 2 and 3
Table 14. Blink-select command bit description
Bit Symbol Value Description
7C0, 1see Figure 20
6 to 3 - 1110 fixed value
2AB blink mode selection
0 normal blinking
[1]
1 alternate RAM bank blinking
[2]
1 to 0 BF[1:0] blink frequency selection
00 off
01 1
10 2
11 3
PCF8576C All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
Product data sheet Rev. 13 — 16 December 2013 30 of 62
NXP Semiconductors
PCF8576C
Universal LCD driver for low multiplex rates
8. Internal circuitry
9. Safety notes
Fig 21. Device protection diagram
DDD
9
/&'
9
66
6<1&
&/.26&$WR$
6$
9
''
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CAUTION
This device is sensitive to ElectroStatic Discharge (ESD). Observe precautions for handling
electrostatic sensitive devices.
Such precautions are described in the ANSI/ESD S20.20, IEC/ST 61340-5, JESD625-A or
equivalent standards.
CAUTION
Static voltages across the liquid crystal display can build up when the LCD supply voltage
(V
LCD
) is on while the IC supply voltage (V
DD
) is off, or vice versa. This may cause unwanted
display artifacts. To avoid such artifacts, V
LCD
and V
DD
must be applied or removed together.
CAUTION
Semiconductors are light sensitive. Exposure to light sources can cause the IC to
malfunction. The IC must be protected against light. The protection must be applied to all
sides of the IC.

PCF8576CHL/1,118

Mfr. #:
Manufacturer:
NXP Semiconductors
Description:
LCD Drivers UNIVERSAL LCD DRIVER LOW MULTIPLEX RATES
Lifecycle:
New from this manufacturer.
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