Pololu A-Star 32U4 Prime LV Quick start guide

PE6 (INT6/AIN0) 1
UVcc 2
D-
3
D+
4
UGnd
5
UCap 6
VBus
7
PB0 (SS/PCINT0)
8
PB1 (PCINT1/SCK)
9
PB2 (PDI/MOSI/PCINT2)
10
PB3 (PDO/MISO/PCINT3)
11
PB7 (OC0A/OC1C/PCINT7/RTS)
12
RESET
13
VCC 14
GND
15
XTAL2
16
XTAL1
17
PD0 (INT0/SCL/OC0B)
18
PD1 (INT1/SDA)
19
PD2 (INT2/RXD1)
20
PD3 (INT3/TXD1)
21
PD5 (XCK1/CTS)
22
GND
23
AVCC 24
PD4 (ICP1/ADC8)
25
PD6 (T1/OC4D/ADC9
26
PD7 (T0/OC4D/ADC10)
27
PB4 (PCINT4/ADC11)
28
PB5 (OC1A/OC4B/PCINT5/ADC12)
29
PB6 (OC1B/OC4B/PCINT6/ADC13)
30
PC6 (OC3A/OC4A) 31
PC7 (ICP3/CLK0/OC4A) 32
PE2 (HWB) 33
VCC 34
GND
35
PF7 (ADC7/TDI) 36
PF6 (ADC6/TDO) 37
PF5 (ADC5/TMS) 38
PF4 (ADC4/TCK) 39
PF1 (ADC1) 40
PF0 (ADC0) 41
AREF 42
GND
43
AVCC 44
PAD
45
ATmega32U4
1 uF
C3
VCC
L1
10 uH
0.1 uF
C5
AVCC
VCC AVCC
VBUS
22
R2
22
R1
nRESET
MISO
MOSI
SCK
TXLED
D8
D9
D10
D11
D3
D2
D0
D1
D4
D12
D6
D7
D5
D13
A0
A1
AREF
D-
D+ D+R
D-R
HWB
A2
A3
A4
A5
RXLED
Y1 16 MHz
10 pF
C1
10 pF
C2
XTAL1
XTAL2
AVR3V3
VBUS 1
D- 2
D+ 3
ID 4
GND 5
NC
6NC 7NC 8NC 9NC
10 NC
11
USB Micro-B
VCC
0.1 uF
C31
0.1 uF
C25
0.1 uF
C32
SW1
A-Star 32U4 Prime LV
©2019 Pololu Corporation
www.pololu.com
Schematic diagram
Primary microcontroller connections
Page 1 of 6
R
0.1 uF
C4
PIC101
PIC102
COC1
PIC201
PIC202
COC2
PIC301
PIC302
COC3
PIC401
PIC402
COC4
PIC501
PIC502
COC5
PIC2501
PIC2502
COC25
PIC3101
PIC3102
COC31
PIC3201
PIC3202
COC32
PIJ101
PIJ102
PIJ103
PIJ104
PIJ105
PIJ106 PIJ107
PIJ108
PIJ109 PIJ1010 PIJ1011
COJ1
PIL101 PIL102
COL1
PIR101 PIR102
COR1
PIR201 PIR202
COR2
PISW101 PISW102
COSW1
PIU101
PIU102
PIU103
PIU104
PIU105
PIU106
PIU107
PIU108
PIU109
PIU1010
PIU1011
PIU1012
PIU1013
PIU1014
PIU1015
PIU1016
PIU1017
PIU1018
PIU1019
PIU1020
PIU1021
PIU1022
PIU1023
PIU1024
PIU1025
PIU1026
PIU1027
PIU1028
PIU1029
PIU1030
PIU1031
PIU1032
PIU1033
PIU1034
PIU1035
PIU1036
PIU1037
PIU1038
PIU1039
PIU1040
PIU1041
PIU1042
PIU1043
PIU1044
PIU1045
COU1
PIY101
PIY102
PIY103
PIY104
COY1

1
2
4
3
5
6
7
8
1
2
4
3
5
6
1
2
4
3
5
6
7
8
1
2
4
3
5
6
7
8
9
10
AREF
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0A5
A4
A3
A2
A1
A0
nRESET
3V3
5V
VIN
D3
D2
Reserved
1
2
4
3
5
6
7
8
1
2
4
3
5
6
1
2
4
3
5
6
7
8
1
2
4
3
5
6
7
8
9
10
AREF
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0A5
A4
A3
A2
A1
A0
nRESET
3V3
5V
VIN
D3
D2
Reserved
MISO
1VCC 2
SCK
3
MOSI
4
RST
5GND 6
AVRISP
5V
nRESET
MOSI
MISO
SCK
HWB
A-Star 32U4 Prime LV
©2019 Pololu Corporation
www.pololu.com
Schematic diagram
External connections
Page 2 of 6
1
2
4
3
5
6
1
2
4
3
5
6
7
8
9
10
11
1
2
4
3
5
6
7
8
9
1
2
4
3
5
6
7
8
9
10
11
1
2
4
3
5
6
7
8
9
1
2
4
3
5
6
1
2
1
2
3
1
2
3
TXLED
RXLED
VREG
STAT
A1
BATLEV
SHDN
D6 1
2
BZCTRL
5V
VIN
Optional power and ground buses
R
PI101
PI102
CO1
PIJ201 PIJ202
PIJ203
PIJ204
PIJ205 PIJ206
COJ2
PIJP101
COJP1
PIJP201
COJP2
PIJP301
PIJP302
PIJP303
PIJP304
PIJP305
PIJP306
PIJP307
PIJP308
COJP3
PIJP401
PIJP402
PIJP403
PIJP404
PIJP405
PIJP406
PIJP407
PIJP408
PIJP409
PIJP4010
COJP4
PIJP501
PIJP502
PIJP503
PIJP504
PIJP505
PIJP506
PIJP507
PIJP508
PIJP509
PIJP5010
PIJP5011
COJP5
PIJP601
PIJP602
PIJP603
PIJP604
PIJP605
PIJP606
COJP6
PIJP701
PIJP702
PIJP703
PIJP704
PIJP705
PIJP706
COJP7
PIJP801
PIJP802
PIJP803
PIJP804
PIJP805
PIJP806
PIJP807
PIJP808
COJP8
PIJP901
PIJP902
PIJP903
PIJP904
PIJP905
PIJP906
PIJP907
PIJP908
PIJP909
COJP9
PIJP1001
PIJP1002
COJP10
PIJP1101
PIJP1102
PIJP1103
PIJP1104
PIJP1105
PIJP1106
PIJP1107
PIJP1108
COJP11
PIJP1201
PIJP1202
PIJP1203
PIJP1204
PIJP1205
PIJP1206
PIJP1207
PIJP1208
PIJP1209
PIJP12010
COJP12
PIJP1301
PIJP1302
PIJP1303
PIJP1304
PIJP1305
PIJP1306
PIJP1307
PIJP1308
PIJP1309
PIJP13010
PIJP13011
COJP13
PIJP1401
PIJP1402
PIJP1403
PIJP1404
PIJP1405
PIJP1406
COJP14
PIJP1501
PIJP1502
PIJP1503
COJP15
PIJP1601
PIJP1602
PIJP1603
COJP16
PIJP1701
PIJP1702
PIJP1703
PIJP1704
PIJP1705
PIJP1706
COJP17
PIJP1801
PIJP1802
PIJP1803
PIJP1804
PIJP1805
PIJP1806
PIJP1807
PIJP1808
COJP18
PIJP1901
PIJP1902
PIJP1903
PIJP1904
PIJP1905
PIJP1906
PIJP1907
PIJP1908
PIJP1909
COJP19

Vss 1
VDD 2
Vo 3
RS 4
R/W 5
E6
DB0 7
DB1 8
DB2 9
DB3 10
DB4 11
DB5 12
DB6 13
DB7 14
LCD
5V
D7
D8
clockwise
R21
10k
D13
TXL
RXL
MISO
DB3
DB2
DB1
DB0
1k
R24
R/W
J18A
J18B
J18C
J18D
J18I
J18J
BuzzerD5
Q4
100k
R16
BZCTRL
5V
30.1k
R13
20k
R15
VIN
BATLEV
20k
R14
D2
Green
1.5k
R4
TXL
5V
D1
Yellow
2.21k
R3
D13
D3
Red
2.21k
R5
RXL
5V
1k
R19
1.5k
R20
SW3 B SW4 C
SW2 A
1k
R27
MISO
3k
R23
3k
R22
A-Star 32U4 Prime LV
©2019 Pololu Corporation
www.pololu.com
Schematic diagram
On-board hardware
Page 3 of 6
1
2
4
3
5
6
7
8
9
10
11
DB0
DB1
DB2
DB3
DB4
DB5
DB6
E
RS E
RS
R/W
DB4
DB5
DB6
DB7
DB7
R
PIBZ101
PIBZ102
COBZ1
PID101
PID102
COD1
PID201
PID202
COD2
PID301
PID302
COD3
PID501
PID502
COD5
PIJ18A01 PIJ18A02
COJ18A
PIJ18B01 PIJ18B02
COJ18B
PIJ18C01 PIJ18C02
COJ18C
PIJ18D01 PIJ18D02
COJ18D
PIJ18I01 PIJ18I02
COJ18I
PIJ18J01 PIJ18J02
COJ18J
PIJP2001
PIJP2002
PIJP2003
PIJP2004
PIJP2005
PIJP2006
PIJP2007
PIJP2008
PIJP2009
PIJP20010
PIJP20011
COJP20
PILCD101
PILCD102
PILCD103
PILCD104
PILCD105
PILCD106
PILCD107
PILCD108
PILCD109
PILCD1010
PILCD1011
PILCD1012
PILCD1013
PILCD1014
COLCD1
PIQ401
PIQ402
PIQ403
COQ4
PIR301
PIR302
COR3
PIR401
PIR402
COR4
PIR501
PIR502
COR5
PIR1301
PIR1302
COR13
PIR1401
PIR1402
COR14
PIR1501
PIR1502
COR15
PIR1601 PIR1602
COR16
PIR1901 PIR1902
COR19
PIR2001 PIR2002
COR20
PIR2101
PIR2102
PIR2103
COR21
PIR2201 PIR2202
COR22
PIR2301 PIR2302
COR23
PIR2401
PIR2402
COR24
PIR2701
PIR2702
COR27
PISW201
PISW202
COSW2
PISW301
PISW302
COSW3
PISW401
PISW402
COSW4

5VVREG VBUS
0.1 uF
C14
0.1 uF
C15
STAT 1
EN
2
VSNS
3
ILIM 4
GND
5
IN2
6
OUT 7 IN1
8
PAD
9
TPS2113A
1 uF
C9
100k
R7
20k
R8
0.1 uF
C8
270
R9
STAT
0.1 uF
C13
10 uF
C7
10 uF
C10
10 uF
C11
10 uF
C12
D6
Blue
10k
R25
D8
Green
2.21k
R26
VBUSVREG
A-Star 32U4 Prime LV
©2019 Pololu Corporation
www.pololu.com
Schematic diagram
Power multiplexing
Page 4 of 6
R
PIC701
PIC702
COC7
PIC801
PIC802
COC8
PIC901
PIC902
COC9
PIC1001
PIC1002
COC10
PIC1101
PIC1102
COC11
PIC1201
PIC1202
COC12
PIC1301
PIC1302
COC13
PIC1401
PIC1402
COC14
PIC1501
PIC1502
COC15
PID601
PID602
COD6
PID801
PID802
COD8
PIR701
PIR702
COR7
PIR801
PIR802
COR8
PIR901
PIR902
COR9
PIR2501
PIR2502
COR25
PIR2601
PIR2602
COR26
PIU201
PIU202
PIU203
PIU204
PIU205
PIU206
PIU207 PIU208
PIU209
COU2

1
2
3.5 mm
BAT+
1
2
3.5 mm
BAT+
1
2
BAT+
1
2
BAT+
3
1
2
DC barrel jack
BAT+
3
1
2
DC barrel jack
BAT+
IN
1
ON/OFF
3OUT 5
NC 4
GND
2
3.3V LDO
4.7 uF
C19
0.1 uF
C21
4.7 uF
C18
5V
1 uF
C16
0.1 uF
C17
1 uF
C20
0.1 uF
C22
0.1 uF
C23
0.1 uF
C24
3V3
NP
R17
AVR3V3
VIN
0.1 uF
C6
A-Star 32U4 Prime LV
©2019 Pololu Corporation
www.pololu.com
Schematic diagram
Regulators and power connectors
Page 5 of 6
Power inputs
JP15
REGEN
SHDN
220k
R6
VIN
Q1
J6
J7 NP
R29
0.1 uF
C28
10 uF
C27 10 uF
C29
10 uF
C30
VIN
VREG
L2
1.2 uH
BAT+
10 uF
C26B
100k
R11
2
3
1
SW6
Through-hole
100k
R12
2
3
1
SW5
SMT
D7
Q3Q2
22 uF
C29B
22 uF
C30B
PG
FB2
VAUX
3
EN
14
PS/SYNC
1
VSEL
15
GND 4
PGND 10
PG 2
FB2 6
FB 5
VOUT 7/8
L2 9 L1
11
VIN
12/13
TPS630701
REGEN10 uF
C26A
10 uF
C26C
R
PIC601
PIC602
COC6
PIC1601
PIC1602
COC16
PIC1701
PIC1702
COC17
PIC1801
PIC1802
COC18
PIC1901
PIC1902
COC19
PIC2001
PIC2002
COC20
PIC2101
PIC2102
COC21
PIC2201
PIC2202
COC22
PIC2301
PIC2302
COC23
PIC2401
PIC2402
COC24
PIC26A01
PIC26A02
COC26A
PIC26B01
PIC26B02
COC26B
PIC26C01
PIC26C02
COC26C
PIC2701
PIC2702
COC27
PIC2801
PIC2802
COC28
PIC2901
PIC2902
COC29
PIC29B01
PIC29B02
COC29B
PIC3001
PIC3002
COC30
PIC30B01
PIC30B02
COC30B
PID701
PID702
COD7
PIJ3a01
PIJ3a02
PIJ3a03
COJ3a
PIJ3b01
PIJ3b02
PIJ3b03
COJ3b
PIJ4A01
PIJ4A02
COJ4A
PIJ4B01
PIJ4B02
COJ4B
PIJ601 PIJ602
COJ6
PIJ701 PIJ702
COJ7
PIJP1501
COJP15
PIJP1701
PIJP1702
COJP17
PIJP2201
PIJP2202
COJP22
PIL201 PIL202
COL2
PINT101 PINT102
CONT1
PIQ101
PIQ102
PIQ103
COQ1
PIQ201PIQ202PIQ203
PIQ204
PIQ205PIQ206PIQ207PIQ208PIQ209
COQ2
PIQ301PIQ302PIQ303
PIQ304
PIQ305PIQ306PIQ307PIQ308PIQ309
COQ3
PIR601
PIR602
COR6
PIR1101
PIR1102
COR11
PIR1201
PIR1202
COR12
PIR1701
PIR1702
COR17
PIR2901
PIR2902
COR29
PISW501
PISW502
PISW503
COSW5
PISW601
PISW602
PISW603
COSW6
PIU301
PIU302
PIU303
PIU304
PIU305
PIU306
PIU30708
PIU309
PIU3010
PIU3011
PIU3012013
PIU3014
PIU3015
COU3
PIU401
PIU402
PIU403 PIU404
PIU405
COU4

DAT2 1
CS 2
DI 3
VDD 4
CLK 5
VSS 6
DO 7
IRQ/DAT1 8
CD
9CD
10
GND
11 GND
12
microSD 3V3
CD
DI
DO
CLK
nCS
DAT1
DAT2 VCC
DI
CLK
nCS
3V3
3V3
MISO
61
52
U5A
43
U5B
42
53 1
U6
Q5
10k
R18
nCS_IN
470
R28
MOSI
SCK
100k
R31
100k
R32
VCC
VCC
DO
100k
R33
3V3
CD
DAT1
DAT2
nCS_IN 1
2
4
3
5
A-Star 32U4 Prime LV
©2019 Pololu Corporation
www.pololu.com
Schematic diagram
microSD hardware
Page 6 of 6
(microSD version only)
R
PIJ501
PIJ502
PIJ503
PIJ504
PIJ505
PIJ506
PIJ507
PIJ508
PIJ509 PIJ5010 PIJ5011 PIJ5012
COJ5
PIJP501
PIJP502
PIJP503
PIJP504
PIJP505
COJP5
PIQ501
PIQ502
PIQ503
COQ5
PIR1801
PIR1802
COR18
PIR2801 PIR2802
COR28
PIR3101 PIR3102
COR31
PIR3201 PIR3202
COR32
PIR3301
PIR3302
COR33
PIU501
PIU502
PIU505
PIU506
COU5A
PIU503 PIU504
COU5B
PIU601
PIU602
PIU603
PIU604
PIU605
COU6