Datasheet

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STM32F103xF, STM32F103xG Electrical characteristics
132
SD/SDIO MMC card host interface (SDIO) characteristics
Unless otherwise specified, the parameters given in Table 58 are derived from tests
performed under ambient temperature, f
PCLKx
frequency and V
DD
supply voltage conditions
summarized in
Table 10.
Refer to Section 5.3.14: I/O port characteristics for more details on the input/output alternate
function characteristics (D[7:0], CMD, CK).
Figure 52. SDIO high-speed mode
Figure 53. SD default mode
Table 58. SD / MMC characteristics
Symbol Parameter Conditions Min Max Unit
f
PP
Clock frequency in data transfer
mode
C
L
≤ 30 pF 0 48 MHz
tW(CKL) Clock low time, f
PP
= 16 MHz C
L
≤ 30 pF 32 -
ns
tW(CKH) Clock high time, f
PP
= 16 MHz C
L
≤ 30 pF 30 -
t
r
Clock rise time C
L
≤ 30 pF - 4
t
f
Clock fall time C
L
≤ 30 pF - 5
T
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