Harman Kardon DVD 48, Руководство по обслуживанию

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Philips Semiconductors
SAA7893HL
Super audio media player
9397 750 10925 © Koninklijke Philips Electronics N.V. 2003. All rights reserved.
•
Parallel interface (UDE data interface part): a parallel front-end interface with a
handshake protocol.
7.2.2 Analog HF input
The analog HF input, coming from the optical pickup unit, is also fed to the
SAA7893HL to extract the copy protection information PSP.
7.3 Audio interface
7.3.1 Audio input
The audio input is a 6-channel PCM-I
2
S input.
7.3.2 DAC interface
The audio output is a 6-channel output and a separate stereo output. Both outputs
can be set in DSD and in PCM-I
2
S mode.
7.4 SDRAM interface
The SDRAM interface forms a glueless interface to one 64 Mbit SDRAM device.
Supported devices are only PC100 compliant or faster SDRAM devices:
•
Organization: 64 Mbit (1M
×
16
×
4 banks)
•
Refresh period: 4096 cycles per 64 ms
•
Clock frequency: f
clk
≥
100 MHz
•
Refresh cycle: t
rcar
≤
70 ns
•
Command period: t
rc
≤
70 ns.
7.5 Clock and reset input
Different processing clocks are needed in the SAA7893HL:
•
sys_clk: system clock for data processing part; frequency can be between
27 and 35 MHz; see
Figure 6 and Table 3
•
aud_clk: audio clock reference; can be 256/384/512/768
×
f
s
(f
s
= 44.1 to 48 kHz);
see Figure 7 and Table 4
•
proc_clk: host processor clock (only used in SAD16_01/02 mode)
•
B_BCLK: front-end bit/byte clock.
It is not required that these clocks are locked.
RESETn is an asynchronous reset and should be kept LOW for at least 10 periods of
sys_clk.
158
DVD48
harman/kardon