
L64014 PCMCIA Bridge
9
PCWAIT_N
PC Wait
Output
The L64014 asserts this signal LOW to delay completion
of a memory or I/O access cycle currently in progress.
PCWE_N
Memory Write Enable
Input
This signal is used for PCMCIA memory writes.
L64020 DVD Decoder Interface
ACLK
Decoder Audio Master Clock
Input
ACLK is an audio output clock from the DVD Decoder.
AD[8:0]
Decoder Address/Data [8:0]
Input/Output
AD[8:0] functions as a nine-bit address bus, an eight-bit
host data bus, or an eight-bit channel data bus.
AREQ_N
Decoder Audio Request
Input
The L64020 asserts AREQ_N when it is ready to receive
a new byte of coded audio data in A/V PES stream mode
(from a transport stream demultiplexer) or a new byte of
any data in a program stream mode. The decoder is
ready when the channel input FIFO is not full.
AS_N
Decoder Address Strobe
Output
When L64014 asserts this signal, the DVD Decoder
latches the address.
ASDATA
Decoder Audio Serial Data
Input
ASDATA receives serial, digital audio data from the
L64020’s audio decoder.
AVALID_N
Decoder Audio Valid
Output
When the L64014 puts a valid data byte on the CH_DATA
bus, it asserts this signal in response to assertion of the
AREQ_N signal from the DVD Decoder. The DVD
Decoder reads the byte when the L64014 deasserts
AVALID_N.
BCLK
Decoder Audio Bit Serial Clock
Input
The L64014 uses this input to clock in the serial audio
data from the DVD Decoder.
CS_N
Decoder Chip Select
Output
The L64014 asserts this signal LOW to access the L64020
DVD Decoder for either a read or a write operation. CS_N
must be asserted LOW the entire read/write cycle.