1999 Aug 25

11

Philips Semiconductors

Preliminary specification

STB5860 (Set-Top Box) STB concept

OM5730

Pin 16 control as per SCART specification for RGB fast

blanking (in this case used to switch between RGB and

composite).

4.5

Memory

4.5.1

A 32-kbyte NVM is implemented with an EEPROM

etc.

4.5.2

DRAM

2 Mbytes (1M

× 16); 60 ns fast or hyper-page mode.

4.5.3

256 kbytes (256 kbytes

× 8) to allow for ROM boot up and

also to provide ROM emulation.

4.5.4

2 Mbytes [2

× (512K × 16)]; this can be is upgraded to

4 Mbytes [2

× (1M × 16)].

Two flash banks are needed to allow code to be run from

one bank while writing to the other.

4.5.5

4 Mbytes SDRAM [2

× (1M × 16)] at 81 MHz.

4.5.6

Surface mount links can select memory configuration.

Remark: the boot CS is selectable between boot ROM and

flash.

4.6

Connectors

Table 3

The main board connectors

CONNECTOR

DESCRIPTION

Optical SPDIF

a SPDIF signal from the SAA7215 is brought out via an optical output connector

SPDIF

to allow connection of the Philips SAA2505 AC3/MPEG7.1 surround sound

SCART

1 standard SCART, audio/video output signals only

3 phonos (RCAs)

CVBS, right audio and left audio

SVHS

the Y/C output from the SAA7215 is brought out to a standard SVHS connector

CCIR 656 connector

a connector to the CCIR 656 YUV output from the SAA7215

JTAG

a standard JTAG connector for boundary scan testing

DEBUG socket

two 64 pins DIN connectors form the debug socket allowing connection to a ROM emulator via

a debug interface board (not included)

RS232

an additional RS232-C (

±12 V) interface to provide a board connector for debug use; one half

of a suitable RS232 driver chip will be used for signal level conversion

IEEE 1394

the Philips PDI1394L11 and PDI1394P11 is implemented to provide half-duplex 1394 access

from the SAA7219; under isolation mode the power for the physical IC will be taken from the

bus via the switching regulator; the option between isolated and non-isolated is selectable via

option links; two 1394 connectors are available on the back panel

IEEE 1294

subject to Electro-Static Discharge (ESD), standard logic are implemented as buffers to

provide 1284 to a 25-way D-type female connector on the back panel