Cirrus-logic AN333 Manuel d'utilisateur télécharger pdf (Page 20)

20 AN333

4.4 Unsolicited Messages

Index = 0xHHHH, data value = 0xhhhhhhhh

No Write Message. No Read Request.

Unsolicited Read Response = 0x8100HHHH 0xhhhhhhhh

4.4.1 Autodetection

Index = 0xHHHH, data value = 0xhhhhhhhh

No Write Command.

No Read Request Command.

Unsolicited Read Response = 0x8100HHHH 0xhhhhhhhh

Table 4-6. Unsolicited Messages

Index Message Description

0x0000 MALLOC_FAILURE Bits 19:16

1 = MALLOC_ERROR_REQ_LIST_OVERFLOW—too many requests.

2 = MALLOC_ERROR_NO_FREE_BLOCK—no non-modulo free block was available

to service next request)

3 = MALLOC_ERROR_NO_MOD_FREE_BLOCK—no modulo free block was

available to service next request)

Message= SPDIF_LOCK_UNLOCK

Bits 6:0

SPDIF LOCKED/SPDIF UNLOCKED unsolicited messages are applicable only if IO_

CONFIG bits 15:0 are set to 0x2000 or 0x02000.

0x40 SPDIF LOCKED

0x41 SPDIF UNLOCKED

0x0002 PLL_OUT_OF_LOCK Bit 23 1

Bits 22:0 Reserved.

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 26 27 28

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Cirrus-logic AN333 Manuel d'utilisateur Page 20