GS9021 datasheet(6/26 Pages) GENNUM

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DETAILED DESCRIPTION

The GS9021 EDH coprocessor consists of five major

blocks:

1. Data Input/Output Block (with automatic standard

detect)

2. Flywheel Block

3. EDH Block

4. Data Processing Block

5. Host Interface (HOSTIF) Block

The following convention is used to differentiate device pins

from HOST interface table bits.

LOGIC OPR (logic operator) gives the combinational

relationship (if one exists), between pins which also have a

corresponding HOST bit. This operator governs the signal

the GS9021 receives. The following is the list of possible

logic operators and their meaning.

1. DATA INPUT/OUTPUT BLOCK

1.1 Parallel Digital Video Data Inputs

Parallel digital video data is supplied to the GS9021 chip

via the DIN[9:0] input pins. The data is clocked into the

GS9021 by the rising edge of PCLKIN.

Eight input signal standards are supported: Composite,

4:2:2 Component with 13.5MHz Y sampling, 4:2:2 16 x 9

wide screen with 18 MHz Y sampling, and 4:4:4:4

Component Single Link with 13.5MHz Y sampling, all in

both NTSC and PAL formats (See Table 1). Both 8 and 10

bit inputs are supported. However, when using 8 bit data,

the 2 LSBs of the input must be tied to GND.

1.2 Parallel Clock Inputs

The PCLKIN pin is the input used to clock the video data

into the GS9021, and serves as the reference to which all

synchronous inputs and outputs are timed. The following

table shows which pins are synchronous with PCLKIN and

which are not. Timing for synchronous I/O is found in

Figures 1 and 2.

LOGIC OPR

HOSTIF

LOGIC OPR

MEANING

AND

XX AND YY

XX OR YY

XX takes precedence over YY

YY takes precedence over XX

LOGIC OPR

HOST BIT

DOUT[9:0]

LOGIC OPR

HOST BIT

PCLKIN

SYNCHRONOUS

ASYNCHRONOUS

FL[4:0]

P[7:5]

S[1:0]

SCL/P4

FIFO_RESET

INTERRUPT

DOUT[9:0]

SDA/P3

F[2:0]

A[2:0]/P[2:0]

VR/W

HA/D

ANC_DATA

BLANK_EN

FLAG_MAP

F_R/W

RESET

NO_EDH

CRC_MODE

STD[3:0]

VBLANKS/L

TRS_ERROR

HOSTIF_MODE

DIN[9:0]

FIFOE/S

FLYWDIS

BYPASS_EDH

SDO_MODE

ANC_CHKSM

CLIP_TRS

GS9021 Datasheet(PDF) 6 Page - Gennum Corporation

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