PCA8514 datasheet(56/64 Pages) PHILIPS

56 / 64 page

1995 Nov 27

Philips Semiconductors

Product speciﬁcation

Stand-alone OSD

PCA8514

14 DEFAULT VALUES AFTER POWER-ON-RESET

The default values of registers after a Power-on-reset are specified in Table 48. All other settings must be initialized by

the user after a Power-on-reset.

Table 48 Default values

BIT

STATE AFTER

RESET

DESCRIPTION

User directly controllable registers

Control Register 1

Scanning mode selection bits. Conventional

NTSC 525LPF/60 Hz and/or PAL 625LPF/50 Hz selected.

Polarity control bit; the output polarities of FB, ACM, R, G, B and

I are active HIGH.

OSD enable/disable control bit; the OSD is disabled.

Control Register 2

HSYNC input polarity control bit; the input polarity is active LOW.

VSYNC input polarity control bit; the input polarity is active LOW.

Display mode selection bits; the North-West shadowing mode is

selected.

Control Register 3

BF1

Blinking frequency control bits. The blinking frequency is set to

fVSYNC/16 Hz.

BF0

BR1

Active ratio of blinking frequency control bits. The active ratio is

set to 3 : 1.

BR0

Control Register 4

A/P

Port control bit. Pin 2 (P04/ACM/VOB2) is selected as an output

port pin.

Control Register 5

Background colour selection bits in Frame shadowing mode; the

default colour is Blue.

−

BS1

Command Bank selection bits. Command Bank 00 is selected.

BS0

User indirectly controllable registers

ACM

The ACM output is LOW unless changed by the Space Code.

Background colour

The Background colour selected is Blue unless changed by the

Space Code.

Character size

The default character size is 1V/1H. A different value can be

selected by using the Carriage Return Code.

End of display

Will continue to display next character (if the OSD clock is

enabled).

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