Requirements
AT91CAP9-STK Starter Kit User Guide
2-19
6351B–CAP–27-Jun-08
2.4.1.5.2 USB High Speed Device
The USB v2.0 High Speed Device interface is managed by the AT91CAP9 USB High Speed Device port
compliant with the USB rev 2.0 High Speed device specification.
The necessary 1.5k
Ω
Pull-up to 3.3V on HSDP (and FSDP) is included in the AT91CAP9 USB
device port.
The implementation is shown below:
2.4.1.6
F6: Touch Screen Controller and LCD Panel
An ADS7843E touch screen controller is implemented on the board. It's controlled by the AT91CAP9
SPI0 bus, with SPI0_NPCS1 chip select.
The figure below, derived from the AT91SAM9261-EK schematics, shows the implementation:
The LCD panel controlled the AT91CAP9 LCD Controller.
C153
22pF
NC
1
2
C152
22pF
NC
1
2
R102
39R
1
2
R103
0R
R105
39R
1
2
R100
12K4
HSDM
USB_PRES
R101
22K
HSDP
D15
SRV05-4
S1
1
S2
6
GND
2
S3
3
S4
4
VDD
5
C150
10uF_1210
1
2
VBUS
FSDP
FSDM
VBUS
C151
100nF
1
2
J38
292304-1
1
2
3
4
5
6
TP21
VCC_ADS
X_LEFT
R130
100K
R131
100K
SPCK
IRQ
MOSI
BUSY
TSC_CS#
MISO
Y_LOW
Y_UP
TWO USER'S ANALOG INPUTS
Full-Scale Input Span 0 to VREF
X_RIGHT
TOUCH SCREEN CONTROLLER
TP19
3V3
R125
100K
R124
100K
TP22
R126
22R
pin 1
pin 10
C172
10
nF
1
2
pin 9
U14
ADS7843E
X+
2
IN3
7
Y+
3
X-
4
Y-
5
GN
D
6
IN4
8
VREF
9
VC
C
10
VC
C
1
DCLK
16
CS
15
DIN
14
BUSY
13
DOUT
12
PENIRQ
11
R127
0R
3V3
TP18
L18
4,7
µ
H 220mA
1
2
C169
10uF_1210
1
2
VREF_ADS
VREF_ADS
3V3
R128
0R
TP20
R133
0R
C170
10n
F
1
2
C171
1
0nF
1
2
VCC_ADS
R129
0R