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PCE84C886

Microcontroller for monitor OSD and auto-sync applications

Philips Electronics 

Philips Semiconductors

Microcontroller for monitor OSD

and auto-sync applications

Preliminary specification

PCE84C886

1 FEATURES

1.1 General

• CMOS 8-bit CPU (enhanced 8048 CPU) with 8 kbytes

system ROM and 192 bytes system RAM

• One 8-bit timer/event counter (T1) and one 8-bit counter

triggered by external input (T3)

• Four single level vectored interrupt sources: external

(INTN), counter/timer, I2C-bus and VSYNCN

• 2 directly testable inputs T0 and T1

• On-chip oscillator clock frequency: 1 to 10 MHz

• On-chip Power-on-reset with low power detector

• Twelve quasi-bidirectional I/O lines, configuration of

each I/O line individually selected by mask option

• Idle and Stop modes for reduced power consumption

• Operating temperature: −25 to +85 °C

• Operating voltage: 4.5 to 5.5 V

• Package: SDIP42.

1.2 Special

• Master-slave I2C-bus interface

• Four 6-bit Pulse Width Modulated outputs

(PWM4 to PWM7)

• Four 7-bit Pulse Width Modulated outputs

(PWM0 to PWM3)

• One 14-bit Pulse Width Modulated output (PWM8)

• Three 4-bit ADC channels

• 16 derivative I/O ports.

1.3 OSD

• Maximum dot frequency (fOSD): 14 MHz

• Display RAM: 64 × 10 bits

• Display character fonts: 62 + 2 special reserved codes

• Character matrix: 12 × 18 (no spacing between

characters)

• 4 character sizes: 1H/1V, 1H/2V, 1H/3V and 1H/4V

• 64 Horizontal starting positions (4 dots for each step)

• 64 Vertical starting positions (4 scan lines for each step)

• Spacing between character rows: 0, 4, 8 and 12 scan

lines

• Foreground colours: 8 on a character-by-character

basis

• Background colours: 8 on a word-by-word basis

• Background/shadowing modes: 4 modes available, No

background, North shadowing, Box shadowing and

Frame shadowing (raster blanking) on a frame basis

• On-chip Phase-Locked Loop (PLL) oscillator (auto-sync

with HSYNCN) with programmable oscillator for On

Screen Display (OSD) function

• Character blinking frequency: programmable using

fVsync divisors of 16, 32, 64 and 128; on a frame basis

• Character blinking ratios: 1 : 1, 1 : 3 and 3 : 1

• Programmable active level polarities of VSYNCN,

HSYNCN, R, G, B and FB

• Flexible display format by using Carriage Return Code

• Auto display RAM address (DCRAR) incremented after

write operation to the Character Data Register (DCRCR)

• VSYNCN generates an interrupt (enabled by software)

when VIEN is active.

2 GENERAL DESCRIPTION

The PCE84C886 is a member of the 84CXXX CMOS

microcontroller family. It is suitable for use in 14", 15" and

17" auto-sync monitors for OSD and auto-sync

applications. The device uses the PCE84CXX processor

core and has 8 kbytes of ROM and 192 bytes of RAM. I/O

requirements are adequately catered for with 12 general

purpose bidirectional I/O lines plus 16 function combined

I/O lines. 9 PWM analog outputs are provided specifically

for analog control purposes and also three 4-bit ADCs. The

device has an 8-bit counter, suitable for use in pulse

counting applications; an 8-bit timer/counter with

programmable clock and an on-chip programmable PLL

oscillator that generates the OSD clock. In addition to all

these features a master-slave I2C-bus interface, 2 directly

testable lines and an enhanced OSD facility for flexible

screen format (64 character types) are also provided.

The block diagram of the PCE84C886 is shown in Fig.1.

3 ORDERING INFORMATION

TYPE NUMBER

PCE84C886

NAME

SDIP42

PACKAGE

DESCRIPTION

plastic shrink dual in-line package; 42 leads (600 mil)

VERSION

SOT270-1

1996 Jan 08

3

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