Atmel AVR365
7
8336A-AVR-03/12
4 Schematic and board layout
4.1 Schematic
This section shows the schematic for the Atmel ATBM302-EK.
Figure 4-1.
ATBM302-EK schematic.
PACK-
VREG
PV2
PV1
NV
CCADC_P
CCADC_N
OD
OC
VF
ET
Charge & Discharge MOSFETs
BATT
PV
T
GND
PV3
PPI
NNI
GND
LED0
Secondary Protection
Status
LED1
LED2
LED3
LED4
ESD
GND
Sense_PI
Sense_NI
OC
G
OD
G
VREG
PACK-
Polarity safety MOSFET
VREG
RESET
SMB_CLOCK
SMB_DATA
Cell-
PV1R
PV2R
Cell+
W
SK
251
25
L
00
0F
E
A
1
2
4
3
R1
PI
NI
FU
S
E
PV3R
PV4
PACK+
PACK-
2
1
MM5Z18VT1G
D3
FUSE
10k
R33
200k
R22
VREG
2
1
BAT54XV2T1G
D12
1
2
3
4
5
6
7
8
9
10
J1
HEADER 2x5
SMB_CLOCK
SMB_DATA
header used for SMBus
1
3
4
2
SKRAALE010
SW1
10n
C20
1
2
3
2N7002
Q4
1k
R2
1k
R5
1k
R4
1k
R3
1k
R11
1k
R14
100R
R19
100R
R12
100R
R13
100R
R15
100R
R16
100R
R20
100R
R21
10k
R30
10k
R29
10k
R28
10k
R27
22n
C18
1u
C19
LED3
LED4
LED0
LED1
LED2
Fuse
Heater
1
2
3
4
SFH-1412A
F1
1M
R51
3
1
2
Si2307
Q7
10k
R52
100R
R6
100R
R7
100R
R8
100R
R9
100R
R10
1M
R18
1M
R17
2.2u
C13
1
2
TB1
1
2
3
TB2
1
2
3
TB3
4
3
5
6
7
2
1
8
Q3 Si4168DY
4
3
5
6
7
2
1
8
Q2 Si4168DY
1
2
3
PMV31XN
Q1
R50 150R
Cut track beneath if mounted
1
2
103AT-4
T1
1
2
103AT-4
T0
200k
R23
100R
R42
PACK-
GND
100nF
C1
100nF
C2
100nF
C3
100nF
C4
100nF
C5
100nF
C6
100nF
C7
100nF
C8
100nF
C9
100nF
C10
100nF
C11
100nF
C12
100nF
C15
100nF
C17
100nF
C14
100nF
C16
100nF
C21
100nF
C22
CO
8
ICT
7
VSS
6
VC3
5
VC2
4
VC1
3
SENSE
2
VCC 1
S-8244AAGFN-CEGT2G
U1
C24
1uF
2.4k
R34
5.1k
R39
5.1k
R38
VREG
FUSE_STATUS
10k
R24
OPC
OPC
FUSE_STATUS
SWITCH
SWITCH
3
2
1
AZ23C5V6-7F
D1
GND
VREG
header used for ISP
GND
MISO
SCK
RESET
MOSI
1
2
3
4
5
6
J2
HEADER 2x3
MISO
MOSI
SCK
OCG
ODG
1k
R35
2
1
D5
2
1
D6
2
1
D7
2
1
D8
2
1
D9
1
2
J3
10n
C26
GND
200R
R37
GND
PF
VREG
GND
GND
PV2
40
PV1
41
NV
42
PI
44
NNI
2
Vc
lm
p1
0
11
OC
18
VF
E
T
12
OD
16
BA
T
T
13
RESET
19
NTC1
8
NTC0 7
VREF 4
VREFGND
3
VR
EG
6
VC
C
14
NC2
17
NC3
27
GN
D
35
GN
D
15
GN
D
5
LED2
22
LED1 21
LED0 20
EXTPORT
29
LED3
23
PV4
38
PV3
39
FUSE 9
INSYS
26
NC 25
LED4 24
ALERT
28
NC
30
FUSE_STATUS
31
SWITCH 10
SDA
32
SCL
33 OPC
34
PPI
43
NI
1
PVT
37
VC
C
36
ATBM302
U2
2
1
MM5Z3V3T1G
D2
200R
R43
2
1
BAT54XV2T1G
D10
2
1
BAT54XV2T1G
D11
2
1
BAT54XV2T1G
D4
10n
C23
10n
C25
4.2 Components placement
Figure 4-2.
The top layer layout.
