GC3011 Datasheet, PDF (26/35 Pages) Texas Instruments – DIGITAL RESAMPLER

GC3011 DIGITAL RESAMPLER
4.9 STATUS REGISTERS
These registers allow the user to read the status information selected by STATUS_SELECT.
4.9.1 READ RATIO
If STATUS_SELECT is 0 the current resampling ratio is read (see the RATIO_HOLD bit in Section
4.8 and the diagram in Figure 2.)
ADDRESS 14: Status Register 0, STATUS_SELECT=0
BIT
TYPE
0-7
R
NAME
RATIO[0:7]
DESCRIPTION
Lower byte of the ratio
ADDRESS 15: Status Register 1, STATUS_SELECT=0
BIT
TYPE
0-7
R
NAME
RATIO[8:15]
DESCRIPTION
Upper byte of the ratio
4.9.2 READ FIFO STATUS
If STATUS_SELECT is 1 the FIFO status is read from address 14. Address 15 is unused.
ADDRESS 14: Status Register 0, STATUS_SELECT=1
BIT
TYPE
NAME
DESCRIPTION
0-3
R
DEPTH[0:3]
The FIFO depth. See Section 2.7.1 for the gray
scale encoding of these bits.
4
R
EMPTY
The FIFO is empty when this bit is high
5
R
HALF_FULL
The FIFO is more than half full when this bit is high
6
R
FULL
The FIFO is full when this bit is high
7
R/Clear
FIFO_ERROR
This bit is set and held when the FIFO full or empty
condition is detected. The user clears the bit by
writing anything to address 14 when
STATUS_SELECT= 1.
GRAYCHIP,INC.
- 26 -
JULY 22, 1996
This document contains information which may be changed at any time without notice