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Appendix B – Schematics
6-8 AT91EB42 Evaluation Board User Guide
Figure 6-7. Reset and JTAG Interface
VCC3V3
VCC3V3
VCC3V3VCC3V3
VCC3V3
VCC3V3
VCC3V3
VCC3V3
NRST
JTAG[0..4]
JTAGSEL
NWDOVF
RESET
RESET
ICE
IEEE
3V3 SUPPLY
CLEAR
RST LED
RSTLEDRSTLEDRSTLED
JTAG0
JTAG1
JTAG2
JTAG4
JTAG3
NRST
G1
G2
G3
G4
G5
JTAG0 JTAG1 JTAG2 JTAG3
JTAG4 NRST
NRST
CTL5
PBRST CTL6
JTAGSEL
G9
G7
G6
G8G7
G2
G5
G8
G3
G6
G1
G4
G9
SW5
TP 33
D10
Red LED
R23
100R
U13
MAX6315US30D4-T
GND
1
VCC
4
MR
3
RST
2
R25
100k
U12
74LVC74AD
S
C1
1D
R
14
7
4
3
2
1
10
11
12
13
5
6
9
8
C53
100nF
U14
MAX6315US30D4-T
GND
1
VCC
4
MR
3
RST
2
R27
100k
C72
10nF
C74
10nF
C76
10nF
C82
10nF
C73
10nF
C78
10pF
C79
10pF
C80
10pF
C81
10pF
C84
10pF
C85
10pF
C94
100nF
P5
HE10 2x10
JTAG
VCC
1
NTRST
3
TDI
5
TMS
7
TCK
9
TCK
11
TDO
13
NRST
15
NC
17
NC
19
VCC
2
GND
4
GND
6
GND
8
GND
10
GND
12
GND
14
GND
16
GND
18
GND
20
CB20
1
2
3
C75
10nF
C77
10nF
C83
10nF
C86
10nF
C71
10nF
C52
100nF
D11
Red LED
R24
100R
U6B
74LVC02AD
1
5
6
4
S1
B.P.
R78
100K