Specifications

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SLWS142J − JANUARY 2003 − REVISED AUGUST 2007
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17.20 General Timer
Table 67. General Timer Page 0xA1 Address 0x11
Rcv Tx FIELD BITS Dflt DESCRIPTION
D D gen_timer 15..0 65535 General-purpose timer. A 24-bit counter. The bottom eight bits of the count value are normally
assumed to be zero. Timer counts down from 256 x (gen_timer + 1) to zero, then repeats. The
timer starts over with every sync, provides ramp data for receive testing, and outputs a pulse at
restart plus five clocks.
Table 68. Receive Syncs Page 0xA1 Address 0x12
Rcv Tx FIELD BITS Dflt DESCRIPTION
D X rinf_zpad 3..0 0 Receive input formatter zero pad count. Effectively interpolates by (rinf_zpad+1) up to the
CK rate.
D X rinf_diag 5..4 0 Receive diagnostic test pattern ramp (0), 0 (1), random (2), constant 0x4000 (3).
D D gen_timer_test 6 0 Shorten gen_timer for test (1) (bottom 8 bits are forced high). Normally 0.
D D gen_timer_sync 9..7 7 Sync control for general timer
D D cksum_sync_front 12..10 7 Sync control for receive input pattern generator and transmit check sum.
D X rinf_zpad_sync 15..13 7 Sync control for receive zero padding
17.21 Transmit Output
Table 69. Transmit Output Multiplexing Page 0xA1 Address 0x13
Rcv Tx FIELD Bits Dflt Description
X D toutf_hold_sync 2..0 7 Sync control for transmit output hold
X C toutf_do 8..4 Transmit output format control for DO. quiet (0), id (1), qb (2), ib LSB’s (4), qa LSB’s (8), CO
complement (16). Others illegal.
X C toutf_co 11..9 Transmit output format control for CO. quiet (0), ic (1), ib (2), qa (4).
X C toutf_bo 15..12 Transmit output format control for BO. quiet (0), ib (1), qa (2), LSB of ia (4), or AO
complement(8).
Table 70. Transmit Output Round and Hold Page 0xA1 Address 0x14
Rcv Tx FIELD BITS Dflt DESCRIPTION
X C toutf_rnd_AB 1..0 Round transmit outputs AO, and BO to 16 (1), 14 (2), 12 (3) bits, or no round (0).
X D toutf_offsetbin 3 0 Offset binary format (1) or two’s complement (0). Common to all transmit outputs.
X C toutf_halfcmplx_AB 4 Time multiplex IQ data by decimating by two at output.
X D toutf_hold 7..5 0 Hold output for toutf_hold+1 clocks − effectively decimating the signal.
X C toutf_rnd_CD 9..8 Round transmit outputs for CO and DO to 16 (1), 14 (2), 12 (3), bits or no round (0).
X C toutf_quiet_CD 10 Quiet CD path (1) when unused.
X C toutf_halfcmplx_CD 11 Time multiplex IQ for channels C and D.
E C toutf_xmt_CD 12 Channels C and D setup in transmit (1) or receive (0).
X C toutf_sumin 13 CO and DO setup as inputs for sumin (1), or outputs (0).
E C toutf_xmt_AB 14 Channels A and B setup in transmit (1) or receive (0).
Table 71. Transmit Checksum Page 0xA1 Address 0x15
Rcv Tx FIELD BITS Dflt DESCRIPTION
− − transmit_cksum 15..0 Checksum results for transmit (read only)