STM32F405xx, STM32F407xx
Electrical characteristics
Figure 75. SD default mode
CK
t
t
OVD
OHD
D, CMD
(output)
ai14888
(1)
Table 88. Dynamic characteristics: SD / MMC characteristics
Symbol
fPP
Parameter
Conditions
Min
Typ
Max
Unit
Clock frequency in data transfer mode
SDIO_CK/fPCLK2 frequency ratio
Clock low time
0
-
48
8/3
-
MHz
-
-
9
tW(CKL)
tW(CKH)
fpp = 48 MHz
fpp = 48 MHz
8.5
8.3
ns
ns
ns
ns
ns
Clock high time
10
-
CMD, D inputs (referenced to CK) in MMC and SD HS mode
tISU
tIH
Input setup time HS
Input hold time HS
fpp = 48 MHz
fpp = 48 MHz
3
0
-
-
-
-
CMD, D outputs (referenced to CK) in MMC and SD HS mode
tOV
tOH
Output valid time HS
Output hold time HS
fpp = 48 MHz
fpp = 48 MHz
-
4.5
-
6
-
1
CMD, D inputs (referenced to CK) in SD default mode
tISUD
tIHD
Input setup time SD
Input hold time SD
fpp = 24 MHz
fpp = 24 MHz
1.5
0.5
-
-
-
-
CMD, D outputs (referenced to CK) in SD default mode
tOVD
tOHD
Output valid default time SD
Output hold default time SD
fpp = 24 MHz
fpp = 24 MHz
-
4.5
-
7
-
0.5
1. Data based on characterization results, not tested in production.
5.3.28
RTC characteristics
Table 89. RTC characteristics
Symbol
Parameter
Conditions
Min
Max
Any read/write operation
from/to an RTC register
-
fPCLK1/RTCCLK frequency ratio
4
-
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