Electrical characteristics
STM32F103xC, STM32F103xD, STM32F103xE
Table 54. SD / MMC characteristics
Symbol
Parameter
Conditions
Min
Max
Unit
Clock frequency in data transfer
mode
fPP
CL 30 pF
0
48
MHz
tW(CKL)
Clock low time, fPP = 16 MHz
Clock high time, fPP = 16 MHz
Clock rise time
CL 30 pF
CL 30 pF
CL 30 pF
CL 30 pF
32
31
tW(CKH)
ns
tr
tf
3.5
5
Clock fall time
CMD, D inputs (referenced to CK)
tISU
tIH
Input setup time
Input hold time
CL 30 pF
CL 30 pF
2
0
ns
ns
CMD, D outputs (referenced to CK) in MMC and SD HS mode
tOV
tOH
Output valid time
Output hold time
CL 30 pF
CL 30 pF
6
7
0.3
0.5
CMD, D outputs (referenced to CK) in SD default mode(1)
tOVD
tOHD
Output valid default time
Output hold default time
CL 30 pF
CL 30 pF
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
Symbol
Parameter
Max
Unit
µs
(1)
tSTARTUP
USB transceiver startup time
1
1. Guaranteed by design, not tested in production.
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Doc ID 14611 Rev 7
STMICROELECTRONICS [ ST ]
