pcf8576d NXP Semiconductors, pcf8576d Datasheet - Page 24

• Manufacturer Part Number: pcf8576d
• Description: Universal Lcd Driver For Low Multiplex Rates
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Table 5 Mode set option 1
Table 6 Mode set option 2
Table 7 Mode set option 3
Table 8 Load data pointer option 1
Table 9 Device select option 1
Table 10 Bank select option 1 (input)
Table 11 Bank select option 2 (output)
2004 Dec 22
Static
1 : 2
1 : 3
1 : 4
1
1
Disabled (blank)
Enabled
6 bit binary value of 0 to 39 P5 P4 P3 P2 P1 P0
3 bit binary value of 0 to 7
RAM bit 0
RAM bit 2
RAM bit 0
RAM bit 2
3
2
Universal LCD driver for low
multiplex rates
DRIVE
MODE
bias
bias
STATIC
STATIC
DESCRIPTION
DESCRIPTION
LCD DRIVE MODE
DISPLAY STATUS
LCD BIAS
BP0
BP0, BP1
BP0, BP1, BP2
BP0, BP1, BP2, BP3
MODE
MODE
BACKPLANE
RAM bits 0 and 1 0
RAM bits 2 and 3 1
RAM bits 0 and 1 0
RAM bits 2 and 3 1
1 : 2
1 : 2
A2
A1
0
1
1
0
0
1
0
1
BITS
BITS
M1
BIT O
BIT B
BIT E
BIT I
BITS
A0
1
0
1
0
M0
24
Table 12 Blink option 1
Table 13 Blink option 2
Note
1. Normal blinking is assumed when LCD multiplex drive
7.9
The display controller executes the commands identified
by the command decoder. It contains the device’s status
registers and co-ordinates their effects. The display
controller is also responsible for loading display data into
the display RAM in the correct filling order.
7.10
In large display configurations, up to 16 PCF8576Ds can
be differentiated on the same I
hardware subaddresses (A0, A1 and A2) and the
programmable I
connected in cascade are synchronized to allow the
backplane signals from only one device in the cascade to
be shared. This arrangement is cost-effective in large LCD
applications since the backplane outputs of only one
device need to be through-plated to the backplane
electrodes of the display. The other cascaded PCF8576Ds
contribute additional segment outputs but their backplane
outputs are left open-circuit (see Fig.19).
Off
2 Hz
1 Hz
0.5 Hz
Normal blinking
Alternate RAM bank blinking
modes 1 : 3 or 1 : 4 are selected.
Display controller
Cascaded operation
BLINK FREQUENCY
BLINK MODE
2
C-bus slave address (SA0). PCF8576Ds
2
C-bus by using the 3-bit
Product specification
PCF8576D
0
0
1
1
0
1
BF1
BIT A
BITS
0
1
0
1
BF0