WP 7
A0
1A1
2A2
3
VCC 8
VSS
4SCL 6
SDA 5
CAT24C32
RP3V3
ID_SD
ID_SC
10k
R49 10k
R50
3V3
1
5V
2GPIO2 3
5V
4GPIO3 5
GND
6
GPIO4 7
GPIO14 8
GND
9
GPIO15 10
GPIO17 11
GPIO18 12
GPIO27 13
GND
14 GPIO22 15
GPIO23 16
3V3
17
GPIO24 18
GPIO10 19
GND
20
GPIO9 21
GPIO25 22
GPIO11 23
GPIO8 24
GND
25
GPIO7 26
ID_SD
27 ID_SC
28
GPIO5 29
GND
30
GPIO6 31
GPIO12 32
GPIO13 33
GND
34
GPIO19 35
GPIO16 36
GPIO26 37
GPIO20 38
GND
39
GPIO21 40
Raspberry Pi Model B+
RP5V
RP3V3
GPIO2
GPIO3
GPIO4
GPIO5
GPIO6
GPIO7
GPIO12
GPIO13
GPIO16
GPIO17
GPIO18
GPIO19
GPIO20
GPIO21
GPIO22
GPIO23
GPIO24
GPIO25
GPIO26
GPIO27
(SDA)
(SCL)
(CE1)
(CE0)
(MISO)
(MOSI)
(SCLK)
(TXD)
(RXD)
GPIO8
GPIO9
GPIO10
GPIO11
GPIO14
GPIO15
ID_SD
ID_SC
1
2
4
3
5
6
7
8
9
10
1
2
4
3
5
1
2
4
3
5
6
7
8
9
10
1
2
4
3
5
GPIO6
GPIO7
GPIO17
(TXD)
(RXD) GPIO14
GPIO15
GPIO10
GPIO11
GPIO13
RP3V3
RP5V
(MOSI)
(SCLK)
GPIO4
GPIO5
GPIO16
GPIO2
GPIO3 (SDA)
(SCL)
GPIO12
GPIO8
GPIO9 (CE0)
(MISO)
(CE1)
GPIO18
GPIO19
GPIO20
GPIO21
GPIO22
GPIO23
GPIO24
GPIO25
GPIO26
GPIO27
RP3V3
0.1 uF
C45
Q11BQ11A
10k
R45 10k
R46
5V3V3
10k
R47 10k
R48
5V3V3
D2(SDA) D3(SCL)GPIO2 GPIO3(SDA) (SCL)
61
52
U9A
43
U9B
42
53 1
U10
3V3
42
53 1
U11
HA LA HB LB
LS2IN LS2OUT
LS2VCC
LS2nOE
LS3IN
LS3VCC
LS3nOE
LS3OUT
0.1 uF
C35 0.1 uF
C36
3V3
0.1 uF
C37
Romi 32U4 Control Board
©2017 Pololu Corporation
www.pololu.com
Schematic diagram
Raspberry Pi connections and level shifters
Dedicated I2C bidirectional shifters
General-purpose dual unidirectional shifter
General-purpose tristatable unidirectional shifters
Rear-right expansion area
