4.9 Logic I/O Interfaces Schematic
0.1uF
C96
VDDGPIO
1.0k
R76
10k
R75
DNP
LMKPDN
100
R77
PDN_R
GPIO LEDs
1
2
3
4
S5 PDN
33pF
100V
C94
DNP
VDDGPIO
3.9k
R69
10k
R68
LMKGPIO0
LMKGPIO1
100pF
C88
DNP
VDDGPIO
3.9k
R53
10k
R51
Yellow
1
2
D7
GPIO0=HI
1
2
3
Q1
BSS138
470
R56
Active High LED
2.5 mA
100pF
C91
DNP
VDDGPIO
3.9k
R65
10k
R63
Yellow
1
2
D9
GPIO1=HI
1
2
3
Q3
BSS138
470
R67
0
R55
0
R66
6
3
1
8
2
7
5
4
S1
SW_4SPST
6
3
1
8
2
7
5
4
S2
SW_4SPST
Active High LED
2.5 mA
33pF
C92
DNP
33pF
C93
DNP
LMKSDIO
I2C/SPI INTERFACE
LMKSCS_ADD
2
3
S3B
1
4
S3A
100pF
C95
DNP
VDDGPIO
3.9k
R72
10k
R70
Yellow
1
2
D10
GPIO2=HI
1
2
3
Q4
BSS138
470
R74
0
R73
6
3
1
8
2
7
5
4
S4
SW_4SPST
Active High LED
2.5 mA
LMKGPIO2
U2AGPIO5/SOMI
1.5k
R58
1.5k
R57
U2A_3V3
SH5
1.5k
R60
DNP
1.5k
R59
DNP
U2A_3V3
U2AGPIO6
U2AGPIO2
U2AGPIO0
U2AGPIO1
U2AGPIO4
U2AGPIO5
U2AGPIO8
U2AGPIO5/SOMI
U2AGPIO3
U2AGPIO7
SH6
Red
1
2
D6
SCLK BUSY
470
R54
0
R61
1
2
4
U5A
U2A_I2CPU
SCLK
1
3
D8
DIODE_BAT54
0.01uF
C90
100k
R62
VDD_PLANE
VDDGPIO
0.1uF
C89
3
1
2
Q2
FDV301N
GND
3
VCC
5
U5B
A01
A02
A03
A04
A05
A06
A07
JP5A
B01
B02
B03
B04
B05
B06
B07
JP5B
0
R71
0
R64
0
R52
TP31
GPIO0
TP33
GPIO1
TP38
GPIO2
TP40
PDN
TP37
ADD/SCS
TP36
SDA/SDIO
TP34
SCL/SCK
TP32
GND
TP35
GND
TP39
GND
LMKSCK
LMKSCK
LMKSDIO
VDDGPIO
VDDGPIO
VDDGPIO
Figure 4-9. Logic I/O Interfaces
EVM Schematics
SNAU279 – JULY 2022
LMK5B33414EVM User's Guide
23
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