SAA7146AH NXP Semiconductors, SAA7146AH Datasheet - Page 115

• Manufacturer Part Number: SAA7146AH
• Manufacturer: NXP Semiconductors

Specifications of SAA7146AH

• Lead Free Status / Rohs Status: Compliant

Philips Semiconductors
7.16.5.4
Specific to each audio interface, A1 or A2, is the programming of bit clock source.
Table 109CLK source definition
7.16.6
There are different levels of switching data streams on and off:
The AUDIO_MODE and WSx_CTRL programming is locally buffered and gets loaded when the corresponding DMA
protection address is reached. When both interfaces are off, changes are loaded immediately.
If an audio interface is switched on, it will start working at TSL pointer reset. Disabling a DMA channel clears the
corresponding FIFO and sets the DMA pointers to their base address: this is the initial state. It is recommended to enable
the output DMA channels before activating the interface, since the output FIFO has to be filled with valid output data.
It is the responsibility of the software to configure data structures, TSL sequences and protection address in such a way,
that they match each other.
2004 Aug 25
1F to 13
12
11
10
0F
0E
0D
0C
0B
0A
09
08
07
06
05
04
03
02
01
00
Ax_CLKSRC [4:0]
DMA transfer enable; switching a DMA channel
AUDIO_MODE; switching the two audio interfaces
WSx_CTRL; switching a physical channel.
Multimedia bridge, high performance
Scaler and PCI circuit (SPCI)
(HEX)
S
WITCHING AUDIO STREAMS
Bit clock control
reserved
ACLK divided-by-384
ACLK divided-by-256
ACLK divided-by-192
ACLK divided-by-128
ACLK divided-by-96
ACLK divided-by-64
ACLK divided-by-48
ACLK divided-by-32
ACLK divided-by-24
ACLK divided-by-16
ACLK divided-by-12
ACLK divided-by-8
ACLK divided-by-6
ACLK divided-by-4
ACLK divided-by-3
ACLK divided-by-2
ACLK
BCLK2
BCLK1
A1 BIT CLOCK
115
reserved
ACLK divided-by-384
ACLK divided-by-256
ACLK divided-by-192
ACLK divided-by-128
ACLK divided-by-96
ACLK divided-by-64
ACLK divided-by-48
ACLK divided-by-32
ACLK divided-by-24
ACLK divided-by-16
ACLK divided-by-12
ACLK divided-by-8
ACLK divided-by-6
ACLK divided-by-4
ACLK divided-by-3
ACLK divided-by-2
ACLK
BCLK1
BCLK2
A2 BIT CLOCK
Product specification
SAA7146A