PCF8535 datasheet(28/52 Pages) PHILIPS

28 / 52 page

1999 Aug 24

Philips Semiconductors

Objective speciﬁcation

× 133 pixel matrix driver

PCF8535

Table 17 Description of the symbols used in Table 16

Note

1. Conditional on other bits.

Table 18 Priority behaviour of bits PD, DOF, HVE and DM; note 1

Note

1. X = don’t care state.

BIT

chip is active

chip is in power-down mode

horizontal addressing

vertical addressing

HVE

voltage multiplier disabled

voltage multiplier enabled

PRS

VLCD programming range LOW

VLCD programming range HIGH

no measurement

start measurement

no X mirror

mirror X

no Y mirror

mirror Y

TRS

top row swap inactive

top row swap active

BRS

bottom row swap inactive

bottom row swap active

internal oscillator enabled; OSC pad ignored

internal oscillator disabled; OSC pad enabled for

input

DM(1)

direct mode disabled

direct mode enabled

DOF(1)

display off mode disabled

display off mode enabled

low current mode for smaller displays

high current mode for larger displays

DOF

HVE

MODE

chip is in power-down mode as deﬁned under PD

all analog blocks except those required for temperature measurement are off

chip is active and using the internal VLCD generator

0001

chip is active and using VDD as VLCD

0000

chip is active and using an external VLCD generator attached to VLCDIN

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