32G431 datasheet(155/198 Pages) STMICROELECTRONICS

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DS12589 Rev 6

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Electrical characteristics

160

I2S characteristics

Unless otherwise specified, the parameters given in Table 84 for I2S are derived from tests

performed under the ambient temperature, fPCLKx frequency and VDD supply voltage

conditions summarized in Table 17: General operating conditions, with the following

configuration:

•

Output speed is set to OSPEEDRy[1:0] = 10

•

Capacitive load C=30pF

•

Measurement points are done at CMOS levels: 0.5 VDD

Refer to Section 5.3.14: I/O port characteristics for more details on the input/output alternate

function characteristics (CK,SD,WS).

Note:

Refer to the reference manual RM0440 "STM32G4 Series advanced Arm®-based 32-bit

MCUs" I2S section for more details about the sampling frequency (Fs), fMCK, fCK, DCK

values reflect only the digital peripheral behavior, source clock precision might slightly

change the values DCK depends mainly on ODD bit value. Digital contribution leads to a min

of (I2SDIV/(2*I2SDIV+ODD) and a max (I2SDIV+ODD)/(2*I2SDIV+ODD) and Fs max

supported for each mode/condition.

Table 84. I2S characteristics(1)

Symbol

Parameter

Conditions

Min

Max

Unit

fMCLK

I2S Main clock

output

256x8 K 256 *Fs(2) MHz

fCK

I2S clock frequency

Master data

64xFs

MHz

Slave data

64xFs

DCK

I2S clock frequency

duty cycle

Slave receiver

tv(WS)

WS valid time

Master mode

th(WS)

WS hold time

Master mode

Slave mode

tsu(WS)

WS setup time

Slave mode

tsu(SD_MR) Data input setup

time

Master receiver

tsu(SD_SR)

Slave receiver

th(SD_MR)

Data input hold time

Master receiver

th(SD_SR)

Slave receiver

tv(SD_ST) Data output valid

time

Slave transmitter (after

enable edge)

2.7 V ≤ VDD ≤ 3.6 V

1.65 V ≤ VDD ≤ 3.6 V

tv(SD_MT)

Master transmitter (after enable edge)

th(SD_ST) Data output hold

time

Slave transmitter (after enable edge)

th(SD_MT)

Master transmitter (after enable edge)

1. Guaranteed by characterization results, not tested in production.

2. 256xFs maximum is 49.152 MHz.

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