Atmel AT91EB42 6-6 AT91EB42 Evaluation Board User Guide, Figure 6-5. Push Buttons, LEDs and Serial Interface

Appendix B – Schematics
6-6 AT91EB42 Evaluation Board User Guide
Figure 6-5. Push Buttons, LEDs and Serial Interface
VCC3V3 VCC3V3 VCC3V3
VCC3V3
VCC3V3
VCC3V3 VCC3V3 VCC3V3 VCC3V3 VCC3V3 VCC3V3 VCC3V3 VCC3V3
VCC3V3
VCC3V3
VCC3V3
VCC3V3
VCC3V3
VCC3V3
VCC3V3
VCC3V3
VCC3V3
VCC3V3
VCC3V3
VCC3V3
Usart 0: SERIAL A Usart 1: SERIAL B
VALID RS232 on IOB
VALBP
DSR0
RTS0 CTS0
DTR0 DCD0
TX0 RX0
TX1
VAL_RS232
RX1
VALBP VALBP
PA9 TXD1
PB9 PB15 PB12
PA7 RXD0
PB13
PA10 RXD1
PB11
PA[6..7]
TIOA0PB7
PB[6..15]
IRQ0PA0
PB8
PB6 TCLK0
PB14
TXD0PA6
PB10
PA0
PA[9..10]
PA7
PB21 TCLK5
R3 100K
C10 47nF
SW1
TP 33
R4 100K C11 47nF
SW2
TP 33
R14 100K
SW3
TP 33
C14 47nF
D1
Red LED
R6 100R
D2 R7 100R D3 R8 100R D4 R9 100R D5 R10 100R
R11 100R
D6
R12 100R
D7 D8 R13 100R
U8
74LV244D
GND SIGNAL
VCC3V3
EN EN
1 2 4 6 8
19 11 13 15 17 3
10
5 7 9 12 14 16 18
20
C17100nF C19100nF
C18 100nF C22 100nF
C21 22pF
P3 Sub D 9b F
5 9 4 8 3 7 2 6 1
C20
22pF
C23 22pF
C26 22pF
C27 22pF
R16 100k
P4 Sub D 9b M
5 9 4 8 3 7 2 6 1
C25 10nF
R17 100K
C13 100nF
C12 100nF
1 2
C16 100nF
JP2 jumper_NO
1 2
JP3 jumper_NO
1 2
C24 22pF
R5 100k
U9 74LV125D
EN
14
7
1 2 4 5
10
9
13 12
3 6 8 11
R75 100R R73 100R
R76 100R D32 GREEN LED R74 100R D30 ORANGE LED
U10 MAX3223ECAP
EN
1
FORCEON
14 FORCEOFF 20
INVALID 11
GND
18
R1IN 16 R2IN 9
R1OUT
15
R2OUT
10
T1IN
13
T2IN
12 T1OUT 17
T2OUT 8
C1+
2
C1-
4
C2+
5
C2-
6
V+ 3
V- 7
VCC
19
R42 100k
R43 100k R44 100k
R15 100K
SW4
TP 33
C15 47nF
D31 GREEN LED D29 ORANGE LED
R45 100k
PB[6..15]
PA[6..7]
PA0
PA[9..10]
PB21