SLWS132 Datasheet, PDF (27/46 Pages) Texas Instruments – QUAD RECEIVER CHIP

GC4014 QUAD RECEIVER CHIP
DATA SHEET REV 0.6
5.11 TEST MODE REGISTER
Register 12 controls the test and diagnostic features of the chip.
ADDRESS 12: Test Mode Register, suggested default = 0x08, power up reset to 0.
BIT
TYPE
NAME
DESCRIPTION
0,1 LSB
R/W
2,3
R/W
4
R/W
5
R/W
6,7
R/W
DIAG_SOURCE
DIAG_SYNC
COUNT_TEST
PD_CLOCK_OFF
POWER_DOWN
This two bit field selects the diagnostic input source used when the
DIAG bit in each channel’s control register is set (See Section 5.17).
DIAG_SOURCE = 0 selects the 14 LSB’s of the counter (see Section
5.10) as a diagnostic ramp. DIAG_SOURCE=1 is a zero input,
DIAG_SOURCE=2 is unused, DIAG_SOURCE= 3 gives a 0x4000
constant input.
The Checksum generator is strobed by this sync. See Table 4 for
the possible sync selections.
Used during factory tests. Should be cleared during normal
operation.
Turns off the clock in the power down mode.
This two bit field controls the power down and keep alive circuit as
follows:
POWER_DOWN
MODE
0
Clock loss detect mode
1
Power down mode
2
Disabled
3
Test
The power_down mode defaults to 0 (clock loss detect mode) upon
power up.
5.12 PAGE MAP REGISTER
This register selects which page is been accessed by addresses 16 through 31. This register also contains
several miscellaneous control bits.
ADDRESS 13: Page Map Register
BIT
0-3 LSBs
TYPE
R/W
NAME
PAGE
4
R/W
5
R/W
6
R/W
7 MSB
R/W
NARROW
DEC_BY_4
16_BIT_INPUT
MSB_POL
DESCRIPTION
The page selection. PAGE=0 selects the channel output data
page, PAGE=1 selects the status page, page=4,5,6 and 7 select
the channel control pages, pages 8,9,10 and 11 select the PFIR
coefficient pages.
Selects the narrow mode CFIR coefficients.
Enables the decimate by 4 mode of the PFIR.
Enables the 16 bit input mode. DIN[6-13] are unused. DIN[0,1],
DIN[2,3], and DIN[4,5] become two additional LSB’s for AIN,
BIN, and CIN respectively.
Invert the input MSB polarity. This will convert an offset binary
formatted input to 2’s complement format.
GRAYCHIP, INC.
- 22 -
APRIL 27, 1999
This document contains information which may be changed at any time without notice