Slot Register (Sai_Aslotr / Sai_Bslotr) - ST STM32F446 Series Reference Manual

Serial audio interface (SAI)
28.5.5

Slot register (SAI_ASLOTR / SAI_BSLOTR)

Address offset: Block A: 0x010
Address offset: Block B: 0x030
Reset value: 0x0000 0000
Note: This register has no meaning in AC'97 and SPDIF audio protocol
31 30 29
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15 14 13
Res. Res. Res. Res.
Bits 31:16 SLOTEN[15:0]: Slot enable.
These bits are set and cleared by software.
Each SLOTEN bit corresponds to a slot position from 0 to 15 (maximum 16 slots).
0: Inactive slot.
1: Active slot.
The slot must be enabled when the audio block is disabled.
They are ignored in AC'97 or SPDIF mode.
Bits 15:12 Reserved, must be kept at reset value.
Bits 11:8 NBSLOT[3:0]: Number of slots in an audio frame.
These bits are set and cleared by software.
The value set in this bitfield represents the number of slots + 1 in the audio frame (including the
number of inactive slots). The maximum number of slots is 16.
The number of slots should be even if FSDEF bit in the SAI_xFRCR register is set.
The number of slots must be configured when the audio block is disabled.
They are ignored in AC'97 or SPDIF mode.
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28 27 26 25
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12 11 10 9
NBSLOT[3:0]
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24 23 22 21
SLOTEN[15:0]
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8 7 6 5
SLOTSZ[1:0] Res.
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RM0390 Rev 4
20 19 18 17
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4 3 2 1
FBOFF[4:0]
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RM0390
16
rw
0
rw