PCF2119RUSLASH2 datasheet(43/68 Pages) PHILIPS

43 / 68 page

2003 Jan 30

Philips Semiconductors

Product speciﬁcation

LCD controllers/drivers

PCF2119X

16 APPLICATION INFORMATION

16.1

General information

The required minimum value for the external capacitors in

an application with the PCF2119x are as follows: Cext for

VLCD and VSS1,2 = 100 nF (min.), and for VDD1,2,3 and

VSS1,2 = 470 nF. Higher capacitor values are

recommended for ripple rejection.

For COG applications the recommended ITO track

resistance is to be minimized for the I/O and supply

connections. Optimized values for these are below 50

Ω

for the supply and below 100

Ω for the I/O connections.

Higher track resistance reduces performance and

increases current consumption.

To avoid accidental triggering of power-on reset

(especially in COG applications), the supplies must be

adequately decoupled. Depending on power supply

quality, VDD1 may have to be raised above the specified

minimum value.

When external VLCD is supplied, VLCD2 should be left

open-circuit to avoid any stray current, and VLCD1 must be

connected to VLCDSENSE.

Fig.30 Direct connection to 8-bit MPU; 8-bit bus.

handbook, full pagewidth

PCF2119x

MGK895

P80CL51

× 16 CHARACTER

LCD DISPLAY

PLUS 160 ICONS

C1 to C80

P20

P21

P22

DB7 to DB0

P17 to P10

R17, R18

R1 to R16

R/W

handbook, full pagewidth

PCF2119x

MGK896

P80CL51

× 16 CHARACTER

LCD DISPLAY

PLUS 160 ICONS

C1 to C80

P10

P11

P12

DB7 to DB4

P17 to P14

R17, R18

R1 to R16

R/W

Fig.31 Direct connection to 8-bit MPU; 4-bit bus.

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