Datasheet

DocID026289 Rev 6 123/149
STM32F411xC STM32F411xE Electrical characteristics
123
6.3.25 RTC characteristics
Table 77. Dynamic characteristics: eMMC characteristics V
DD
= 1.7 V to 1.9 V
(1)(2)
1. Guaranteed by characterization results.
2. C
load
= 20 pF
Symbol Parameter Conditions Min Typ Max Unit
f
PP
Clock frequency in data transfer
mode
-0-50MHz
- SDIO_CK/fPCLK2 frequency ratio - - - 8/3 -
t
W(CKL)
Clock low time fpp = 50 MHz 10 10.5 -
ns
t
W(CKH)
Clock high time fpp = 50 MHz 9 9.5 -
CMD, D inputs (referenced to CK) in eMMC mode
t
ISU
Input setup time HS fpp = 50 MHz 0 - - ns
t
IH
Input hold time HS fpp = 50 MHz 6 - -
CMD, D outputs (referenced to CK) in eMMC mode
t
OV
Output valid time HS fpp = 50 MHz - 3.5 5
ns
t
OH
Output hold time HS fpp = 50 MHz 2 - -
Table 78. RTC characteristics
Symbol Parameter Conditions Min Max
-f
PCLK1
/RTCCLK frequency ratio
Any read/write operation
from/to an RTC register
4-
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