Datasheet

Electrical characteristics STM32L475xx
190/204 DS10969 Rev 5
6.3.29 SWPMI characteristics
The Single Wire Protocol Master Interface (SWPMI) and the associated SWPMI_IO
transceiver are compliant with the ETSI TS 102 613 technical specification.
Table 99. Synchronous multiplexed PSRAM write timings
(1)(2)
1. CL = 30 pF.
2. Guaranteed by characterization results.
Symbol Parameter Min Max Unit
t
w(CLK)
FMC_CLK period 2T
HCLK
-1 -
ns
t
d(CLKL-NExL)
FMC_CLK low to FMC_NEx low (x=0..2) - 2
t
d(CLKH-NExH)
FMC_CLK high to FMC_NEx high (x= 0…2) T
HCLK
+0.5 -
t
d(CLKL-NADVL)
FMC_CLK low to FMC_NADV low - 2.5
t
d(CLKL-NADVH)
FMC_CLK low to FMC_NADV high 1 -
t
d(CLKL-AV)
FMC_CLK low to FMC_Ax valid (x=16…25) - 3.5
t
d(CLKH-AIV)
FMC_CLK high to FMC_Ax invalid (x=16…25) T
HCLK
-
t
d(CLKL-NWEL)
FMC_CLK low to FMC_NWE low - 2
t
d(CLKH-NWEH)
FMC_CLK high to FMC_NWE high T
HCLK
+1 -
t
d(CLKL-ADV)
FMC_CLK low to FMC_AD[15:0] valid - 4
t
d(CLKL-ADIV)
FMC_CLK low to FMC_AD[15:0] invalid 0 -
t
d(CLKL-DATA)
FMC_A/D[15:0] valid data after FMC_CLK low - 5.5
t
d(CLKL-NBLL)
FMC_CLK low to FMC_NBL low - 2.5
t
d(CLKH-NBLH)
FMC_CLK high to FMC_NBL high T
HCLK
+1 -
t
su(NWAIT-CLKH)
FMC_NWAIT valid before FMC_CLK high 0 -
t
h(CLKH-NWAIT)
FMC_NWAIT valid after FMC_CLK high 4 -
Table 100. SWPMI electrical characteristics
(1)
1. Guaranteed by design.
Symbol Parameter Conditions Min Typ Max Unit
t
SWPSTART
SWPMI regulator startup time
SWP Class B
2.7 V  V
DD
 3,3V
- - 300 s
t
SWPBIT
SWP bit duration
V
CORE
voltage range 1 500 - -
ns
V
CORE
voltage range 2 620 - -
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