Interrupt Mask Register 2 (Sai_Aim / Sai_Bim) - ST STM32L4x6 Reference Manual

Serial audio interface (SAI)
39.5.6

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, always read as 0.
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.
Bit 4 CNRDYIE: Codec not ready interrupt enable (AC'97).
This bit is set and cleared by software.
0: Interrupt is disabled
1: Interrupt is enabled
When the interrupt is enabled, the audio block detects in the slot 0 (tag0) of the AC'97 frame if the
Codec connected to this line is ready or not. If it is not ready, the CNRDY flag in the SAI_xSR
register is set and an interruption i generated.
This bit has a meaning only if the AC'97 mode is selected through PRTCFG[1:0] bits and the audio
block is operates as a receiver.
Bit 3 FREQIE: FIFO request 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 is generated if the FREQ bit in the SAI_xSR register is set.
Since the audio block defaults to operate as a transmitter after reset, the MODE bit must be
configured before setting FREQIE to avoid a parasitic interruption in receiver mode,
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27 26 25 24
Res. Res. Res. Res.
11 10 9 8
Res. Res. Res. Res.
DocID024597 Rev 3
23 22 21
Res. Res. Res.
7 6 5
LFSDET AFSDET CNRDY
Res.
IE IE
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20 19 18
Res. Res. Res.
4 3 2
FREQ WCKCFG MUTEDET
IE IE IE
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RM0351
17 16
Res. Res.
1 0
OVRUDR
IE IE
rw rw