Electrical characteristics
Table 54.
Symbol
f
PP
t
W(CKL)
t
W(CKH)
t
r
t
f
STM32F103xC, STM32F103xD, STM32F103xE
SD / MMC characteristics
Parameter
Clock frequency in data transfer
mode
Clock low time, f
PP
= 16 MHz
Clock high time, f
PP
= 16 MHz
Clock rise time
Clock fall time
Conditions
C
L
30 pF
C
L
30 pF
C
L
30 pF
C
L
30 pF
C
L
30 pF
Min
0
32
31
ns
3.5
5
Max
48
Unit
MHz
CMD, D inputs (referenced to CK)
t
ISU
t
IH
Input setup time
Input hold time
C
L
30 pF
C
L
30 pF
2
ns
0
CMD, D outputs (referenced to CK) in MMC and SD HS mode
t
OV
t
OH
Output valid time
Output hold time
C
L
30 pF
C
L
30 pF
0.3
6
ns
CMD, D outputs (referenced to CK) in SD default mode
(1)
t
OVD
t
OHD
Output valid default time
Output hold default time
C
L
30 pF
C
L
30 pF
0.5
7
ns
1. Refer to SDIO_CLKCR, the SDI clock control register to control the CK output.
USB characteristics
The USB interface is USB-IF certified (Full Speed).
Table 55.
USB startup time
Parameter
USB transceiver startup time
Max
1
Unit
µs
Symbol
t
STARTUP(1)
1. Guaranteed by design, not tested in production.
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Doc ID 14611 Rev 7
STMICROELECTRONICS [ STMICROELECTRONICS ]
