SAA7348GP Datasheet, PDF (29/60 Pages) NXP Semiconductors – All Compact Disc Engine ACE

Philips Semiconductors
All Compact Disc Engine (ACE)
Preliminary specification
SAA7348GP
8.1.7 DECODER STATUS REGISTER (DSR)
The decoder status register provides decoder status information. The register is byte addressable; read only.
Table 20 Decoder status register (address 0XEBH)
7
6
5
4
3
2
1
0
Decoder_stat.7 TX_full Dec_motov Dec_pll_flock Dec_pll_lock Dec_motstop Dec_motstart_2 Dec_motstart_1
Table 21 Description of DSR bits
BIT
SYMBOL
7
Decoder_stat.7
6
TX_full
5
Dec_motov
4
Dec_pll_flock
3
Dec_pll_lock
2
Dec_motstop
1
Dec_motstart_2
0
Dec_motstart_1
DESCRIPTION
−
communication buffer to decoder is full
motor-overflow: decoder status signal; motor output saturates
PLL_flock: decoder internal signal; can be forced by µP
PLL_lock: decoder internal signal; can be forced by µP
motstop: decoder status signal; speed <12%
motstart 2: decoder status signal; speed >50%
motstart 1: decoder status signal; speed >75%
1997 Jul 11
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