Datasheet

DocID025936 Rev 8 109/143
STM32L052x6 STM32L052x8 Electrical characteristics
112
I2S characteristics
Note: Refer to the I2S section of the product reference manual for more details about the sampling
frequency (Fs), f
MCK
, f
CK
and D
CK
values. These values reflect only the digital peripheral
behavior, source clock precision might slightly change them. DCK depends mainly on the
ODD bit value, digital contribution leads to a min of (I2SDIV/(2*I2SDIV+ODD) and a max of
(I2SDIV+ODD)/(2*I2SDIV+ODD). Fs max is supported for each mode/condition.
Table 76. I2S characteristics
(1)
Symbol Parameter Conditions Min Max Unit
f
MCK
I2S Main clock output - 256 x 8K 256xFs
(2)
MHz
f
CK
I2S clock frequency
Master data: 32 bits - 64xFs
MHz
Slave data: 32 bits - 64xFs
D
CK
I2S clock frequency duty
cycle
Slave receiver 30 70 %
t
v(WS)
WS valid time Master mode - 15
ns
t
h(WS)
WS hold time Master mode 11 -
t
su(WS)
WS setup time Slave mode 6 -
t
h(WS)
WS hold time Slave mode 2 -
t
su(SD_MR)
Data input setup time
Master receiver 0 -
t
su(SD_SR)
Slave receiver 6.5 -
t
h(SD_MR)
Data input hold time
Master receiver 18 -
t
h(SD_SR)
Slave receiver 15.5 -
t
v(SD_ST)
Data output valid time
Slave transmitter (after enable edge) - 77
t
v(SD_MT)
Master transmitter (after enable edge) - 8
t
h(SD_ST)
Data output hold time
Slave transmitter (after enable edge) 18 -
t
h(SD_MT)
Master transmitter (after enable edge) 1.5 -
1. Guaranteed by characterization results.
2. 256xFs maximum value is equal to the maximum clock frequency.
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