TDA9554PS datasheet(31/125 Pages) PHILIPS

31 / 125 page

2000 Jun 22

Philips Semiconductors

Tentative Device Speciﬁcation

TV signal processor-Teletext decoder with

embedded

µ-Controller

TDA955X/6X/8X PS/N1 series

External (Auxiliary + Display) Memory

The normal 80C51 external memory area has been

mapped internally to the device, this means that the MOVX

instruction accesses data memory internal to the device.

The movx memory map is shown in Fig.8.

Auxiliary RAM Page Selection

The Auxiliary RAM page pointer is used to select one of

the 256 pages within the auxiliary RAM, not all pages are

allocated, refer to Fig.9. A page consists of 256

consecutive bytes. XRAMP only works on internal MOVX

memory.

Power-on Reset

Power on reset is generated internally to the

TDA955x/6x/8x device, hence no external reset circuitry is

required. The TV processor die shall generate the master

reset in the system, which in turn will reset the

microcontroller die

A external reset pin is still present and is logically ORed

with the internal Power on reset. This pin will only be used

for test modes and OTP/ISP programming. The active high

reset pin incorporates an internal pull-down, thus it can be

left unconnected in application.

Power Saving modes of Operation

There are three Power Saving modes, Idle, Stand-by and

Power Down, incorporated into the Painter1_Plus die.

When utilizing either mode, the 3.3v power to the device

(Vddp, Vddc & Vdda) should be maintained, since Power

Saving is achieved by clock gating on a section by section

basis.

STAND-BY MODE

During Stand-by mode, the Acquisition and Display

sections of the device are disabled. The following

functions remain active:-

• 80c51 CPU Core

• Memory Interface

• I2C

• Timer/Counters

• WatchDog Timer

• SAD and PWMs

Data RAM(1)

0000H

01FFH

7FFFH

8000H

845FH

Display RAM

for

Closed Caption(3)

8700H

871FH

CLUT

87F0H

87FFH

Display Registers

8800H

8BFFH

Dynamically

Re-definable

Characters

Lower 32K bytes

Upper 32K bytes

8C00H

FFFFH

Fig.8 Movx Address Map

0200H

47FFH

4800H

Display RAM

for

TEXT PAGES(2)

(1) Amount of Data RAM depends on device, PainterOSD 64K has 0.75K,

Painter1.1 has 1K and Painter1.10 has 2K

(2) Amount of Display RAM depends on the device, PainterOSD 64K has

1.25K, Painter1.1 has 2K and Painter1.10 has 10K

(3) Display RAM for Closed Caption and Text is shared

(XRAMP)=00H

0000H

00FFH

0100H

01FFH

00H

FFH

00H

FFH

(XRAMP)=01H

(XRAMP)=FEH

FE00H

FEFFH

FF00H

FFFFH

00H

FFH

00H

FFH

(XRAMP)=FFH

MOVX @DPTR,A

MOVX @Ri, A

MOVX A, @Ri

MOVX A,@DPTR

Fig.9 Indirect addressing

(Movx address space)

TDA9554PS Datasheet(PDF) 31 Page - NXP Semiconductors

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