Datasheet

DS5792 Rev 13 103/143
STM32F103xC, STM32F103xD, STM32F103xE Electrical characteristics
135
SD/SDIO MMC card host interface (SDIO) characteristics
Unless otherwise specified, the parameters given in Table 55 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 54. SDIO high-speed mode
Figure 55. SD default mode
Table 55. 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
AI
#+
$#-$
OUTPUT
T
/6$
T
/($