Interrupt Mask Register 2 (Sai_Aim / Sai_Bim) - ST STM32F446 Series Reference Manual

RM0390
Bits 7:6 SLOTSZ[1:0]: Slot size
This bits is set and cleared by software.
The slot size must be higher or equal to the data size. If this condition is not respected, the behavior
of the SAI will be undetermined.
Refer to
SD line.
These bits must be set when the audio block is disabled.
They are ignored in AC'97 or SPDIF mode.
00: The slot size is equivalent to the data size (specified in DS[3:0] in the SAI_xCR1 register).
01: 16-bit
10: 32-bit
11: Reserved
Bit 5 Reserved, must be kept at reset value.
Bits 4:0 FBOFF[4:0]: First bit offset
These bits are set and cleared by software.
The value set in this bitfield defines the position of the first data transfer bit in the slot. It represents
an offset value. In transmission mode, the bits outside the data field are forced to 0. In reception
mode, the extra received bits are discarded.
These bits must be set when the audio block is disabled.
They are ignored in AC'97 or SPDIF mode.
28.5.6

Interrupt mask register 2 (SAI_AIM / SAI_BIM)

Address offset: block A: 0x014
Address offset: block B: 0x034
Reset value: 0x0000 0000
31 30 29 28
Res. Res. Res. Res.
15 14 13 12
Res. Res. Res. Res.
Bits 31:7 Reserved, must be kept at reset value.
Bit 6 LFSDETIE: Late frame synchronization detection interrupt enable.
This bit is set and cleared by software.
0: Interrupt is disabled
1: Interrupt is enabled
When this bit is set, an interrupt will be generated if the LFSDET bit is set in the SAI_xSR register.
This bit is meaningless in AC'97, SPDIF mode or when the audio block operates as a master.
Bit 5 AFSDETIE: Anticipated frame synchronization detection interrupt enable.
This bit is set and cleared by software.
0: Interrupt is disabled
1: Interrupt is enabled
When this bit is set, an interrupt will be generated if the AFSDET bit in the SAI_xSR register is set.
This bit is meaningless in AC'97, SPDIF mode or when the audio block operates as a master.
Section : Output data line management on an inactive slot
27 26 25 24
Res. Res. Res. Res.
11 10 9 8
Res. Res. Res. Res.
23 22 21
Res. Res. Res.
7 6 5
LFSDET AFSDET
Res.
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RM0390 Rev 4
Serial audio interface (SAI)
for information on how to drive
20 19 18
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4 3 2
CNRDY FREQ WCKCFG MUTEDET
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1 0
OVRUDR
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