®
PMD-100
PMD-100 Process Decoder
Pin Description (Stand-Alone Mode) -
Pin 9 Low
( I = Input, O = Output. All input levels TTL compatible
except XTI which must be CMOS level. No inputs have
pull-ups. All outputs are full CMOS levels. )
1:
2:
3:
DIN (I)
BCKI (I)
XTIM (I)
Serial data input.
Bit clock input.
Select system clock frequency.
Low = 256 Fs, High = 384 Fs.
Dither select.
4:
DITH (I)
Low = dither disabled,
High = dither added.
5:
GAIN (O) Analog output stage gain.
Use only if Pin 19 is High (see page
14).
Low = low gain,
High = high gain (+6 dB).
(See pin 19 description).
System clock input.
+5 volt power for filter.
Ground
Select Program mode.
Low = Stand-Alone,
High = Program.
6:
7:
8:
9:
XTI (I)
VDD1
VSS1
PROG(I)
Low = off, High = on.
17: HMUTE (I) Hard mute. Low = off, High = on.
18: FSEL (I)
De-emphasis filter Fs.
Low = 44.1 kHz, High = 48 kHz.
Gain scaling.
Note: Pins 10 through 14 perform different functions
depending on whether Stand-Alone or Program mode is
selected.
19: SCAL (I)
Low = 6dB gain scaling is performed
internally in the digital domain,
High = analog output gain stage is set
by pin 5 GAIN. (See page 14.)
Stand-Alone Mode:
10: OSIZ0 (I)
20: DG (O) DAC sample and hold deglitch signal.
11: OSIZ1 (I)
21: VSS2
22: VDD2
Ground. (Common with VSS1)
+5 volt power for output interface.
These two pins determine the output word size, as well as
the number of pulses on BCKO.
23: DOR (O) Right channel serial data output.
24: DOL (O) Left channel serial data output.
25: WCKO(O) Word clock output.
26: BCKO (O) Bit clock output.
27: HDCD (O) HDCD encoding detect.
Low = no encoding. High = HDCD
12: COB (I)
13: JUST (I)
Output data format.
Low = complementary offset binary,
High = 2’s complement.
Input data justification.
Low = data assumed to be left justi
fied up to 24 bits in length,
High = data right justified 16 bits.
Input data latching.
encoded input data. (Output current
rated at 12mA.)
28: LRCI (I)
Word clock input.
14: BCPL (I)
Low = input data latched on rising
edge of BCKI. High = input data
latched on falling edge of BCKI.
15: SMUTE (I) Soft mute. Low = off, High = on.
16: DEEMPH(I)De-emphasis filter.
Pacific Microsonics, Inc.
32990 Alvarado Niles Road, Suite 910
Union City , CA 94587
4
Phone (510) 475-8000
Fax (510) 475-8005
ETC [ ETC ]
