GC3021 datasheet(22/37 Pages) TI1

22 / 37 page

GRAYCHIP, INC.

- 20 -

JUNE 22, 1998

GC3021 MIXER AND CARRIER REMOVAL CHIP

DATA SHEET

This document contains information which may be changed at any time without notice

4.7

OUTPUT CONTROL REGISTERS

Registers 8, 9, 10 and 11 contain the four output format control words. Each register is identical.

OUTPUT_REGA controls output YA, OUTPUT_REGB controls output YB, OUTPUT_REGC controls output

YC and OUTPUT_REGD controls output YD. The suggested default is 1FFF.

ADDRESS 8:

OUTPUT_REGA

ADDRESS 9:

OUTPUT_REGB

ADDRESS 10:

OUTPUT_REGC

ADDRESS 11:

OUTPUT_REGD

BIT

TYPE

NAME

DESCRIPTION

0-11

R/W

MASK

12 Bit output mask. MASK is bitwise anded with the

output sample. Bit 0 is the LSB, bit 11 is the MSB.

R/W

OUTPUT_SEL

Selects which signal is output on this port. See

Table 2 in Section 2.11.

R/W

RND_8

Round to 8 bits

R/W

RND_10

Round to 10 bits

R/W

Unused

The RND_8 and RND_10 controls are used to round the 12 bit output values to 8 or 10 bits. Only

one control should be high.

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