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STM32U545NET6QTR bảng dữ liệu(PDF) 251 Page - STMicroelectronics

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DS14216 Rev 1
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STM32U545xx
Electrical characteristics
258
Figure 52. USART timing diagram in slave mode
5.3.35
SPI characteristics
Unless otherwise specified, the parameters given in the table below are derived from tests
performed under the ambient temperature, fPCLKx frequency and supply voltage conditions
summarized in Table 33.
•
Output speed set to OSPEEDRy[1:0] = 10
•
Capacitive load CL = 30 pF
•
Measurement points done at 0.5 × VDD level
•
I/O compensation cell activated
•
HSLV activated when VDD ≤ 2.7 V
Refer to Section 5.3.14: I/O port characteristics for more details on the input/output alternate
function characteristics (NSS, SCK, MOSI, MISO for SPI).
MSv65387V4
NSS
input
CPHA = 0
CPOL = 0
CPHA = 0
CPOL = 1
TX output
RX input
tsu(RX)
th(RX)
tw(CKL)
tw(CKH)
1/fCK
th(NSS)
tsu(NSS)
tv(TX)
Next bits IN
Last bit OUT
First bit IN
First bit OUT
Next bits OUT
th(TX)
Last bit IN



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