CS5535 datasheet(238/555 Pages) NSC

238 / 555 page

www.national.com

238

Revision 0.8

ACC Register Descriptions (Continued)

5.3.2.3

Codec Status Register (ACC_CODEC_STATUS)

19:0

PIN_DATA

Codec GPIO Pin Data. This is the GPIO pin data that is sent to the codec in slot 12 of

the serial output stream.

Note:

All 20 bits of the output slot 12 are controllable through this register, even

though some are reserved per the AC97 spec and should be set to zero.

ACC I/O Offset

08h

Type

R/W

Reset Value

00000000h

ACC_CODEC_STATUS Register Map

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10

9876543210

STS_ADD

STS_DATA

ACC_CODEC_STATUS Bit Descriptions

Bit

Name

Description

31:24

STS_ADD

Codec Status Address (Read Only). Address of the register for which status is being

returned. This address comes from slot 1 bits [19:12] of the serial input stream.

Note:

Bit 19 of slot 1 is reserved, but still observable by software.

PRM_RDY_STS

Primary Codec Ready (Read Only). Indicates the ready status of the primary codec

(slot 0, bit 15). Software should not access the codec or enable any bus masters until

this bit is set. This bit is cleared when the AC Link Shutdown bit is set in the Codec

Control register (ACC I/O Offset 0Ch[18]).

SEC_RDY_STS

Secondary Codec Ready (Read Only). Indicates the ready status of the secondary

codec (slot 0, bit 15). Software should not access the codec or enable any bus masters

until this bit is set. This bit is cleared when the AC Link Shutdown bit is set in the Codec

Control register (ACC I/O Offset 0Ch[18]).

SDATAIN2_EN

Enable Second Serial Data Input (AC_S_IN2) .

0: Disable.

1: Enable.

For the second serial input to function, this bit must be set. This is functionally ANDed

with the AC_S_IN2 port of the ACC. Often, it may be necessary to configure a corre-

sponding I/O pin as an input on the chip containing the ACC.

BM5_SEL

Audio Bus Master 5 AC97 Slot Select. Selects the serial input slot for Audio Bus Mas-

ter 5 to receive data.

0: Slot 6.

1: Slot 11.

BM4_SEL

Audio Bus Master 4 AC97 Slot Select. Selects slot for Audio Bus Master 4 to transmit

data.

0: Slot 6.

1: Slot 11.

RSVD

Reserved. Reads return 0

ACC_GPIO_CNTL Bit Descriptions

Bit

Name

Description

CS5535 датащи(PDF) 238 Page - National Semiconductor (TI)

CS5535 датащи(HTML) 238 Page - National Semiconductor (TI)

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

датащи скачать

ссылки URL