Table 53. I2S Characteristics - STMicroelectronics STM32L151QCH6 Manual

Electrical characteristics
Symbol
t
rfm
V
CRS
1. Guaranteed by design, not tested in production.
2. Measured from 10% to 90% of the data signal. For more detailed informations, please refer to USB
Specification - Chapter 7 (version 2.0).
I2S characteristics
Symbol
f
MCK
f
CK
D
CK
t
r(CK)
t
f(CK)
t
v(WS)
t
h(WS)
t
su(WS)
t
h(WS)
t
su(SD_MR)
t
su(SD_SR)
t
h(SD_MR)
t
h(SD_SR)
t
v(SD_ST)
t
h(SD_ST)
t
v(SD_MT)
t
h(SD_MT)
1. The maximum for 256xFs is 8 MHz
Note: Refer to the I2S section of the product reference manual for more details about the sampling
frequency (Fs), f
behavior, source clock precision might slightly change them. DCK depends mainly on the
100/133
Table 52. USB: full speed electrical characteristics (continued)
Parameter
Rise/ fall time matching
Output signal crossover voltage

Table 53. I2S characteristics

Parameter
I2S Main Clock Output
I2S clock frequency
I2S clock frequency duty cycle Slave receiver, 48KHz
I2S clock rise time
I2S clock fall time
WS valid time
WS hold time
WS setup time
WS hold time
Data input setup time
Data input setup time
Data input hold time
Data output valid time
Data output hold time
Data output valid time
Data output hold time
, f and D
MCK CK CK
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STM32L151xC/C-A STM32L152xC/C-A
(1)
Driver characteristics
Conditions
t /t
r f
Conditions
Master data: 32 bits
Slave data: 32 bits
Capacitive load CL=30pF
Master mode
Master mode
Slave mode
Slave mode
Master receiver
Slave receiver
Master receiver
Slave receiver
Slave transmitter
(after enable edge)
Slave transmitter
(after enable edge)
Master transmitter
(after enable edge)
Master transmitter
(after enable edge)
values. These values reflect only the digital peripheral
Min Max Unit
90 110
1.3 2.0
Min Max
(1)
256 x 8K 256xFs
- 64xFs
- 64xFs
30 70
8
-
8
4 24
0 -
15 -
0 -
8 -
9 -
5 -
4 -
- 64
22 -
- 12
8 -
%
V
Unit
MHz
MHz
%
ns