HX3 Kits User Guide, Doc. #: 001-91203 Rev. *D
67
Hardware
5.2
CY4603 DVK Hardware Design
5.2.1
Board Details
The CY4603 DVK hardware consists of the following components:
■
CYUSB3314-88LTXC hub controller
■
Power supply block to provide 5-V, 3.3-V, and 1.2-V outputs
■
Four USB 3.0 downstream ports and one USB 3.0 upstream port
■
Configuration-mode selection jumpers (J17 and J18)
■
Onboard 16-KB EEPROM to store configuration data and HX3 firmware
■
Power LED (PWR) and Hub Suspend Status LED (SUSP)
■
Port Status Indicator LEDs
■
Current-measurement jumper (J6)
5.2.2
Theory of Operation
This section provides a block-level description of the CY4603 hardware shown in
Figure 5-11. CY4603 Hardware Block Diagram
The CY4603 DVK supports four downstream ports, which are terminated as USB 3.0 type-A connec-
tors. All these downstream ports conform to the USB 3.0 and BC v1.2 specifications. They also sup-
port Ghost Charging and emulate Apple charging. Each downstream port is controlled using a power
switch, which allows monitoring an overcurrent situation on each downstream port and the shutdown
of the ports with an overcurrent condition selectively.
The CYUSB3314-88LTXC hub controller is clocked using a 26-MHz crystal. More details about the
crystal specification are available in the HX3 datasheet. The DVK is powered using a 5-V AC-DC
adapter. The DVK is shipped with a 5-V AC-DC adapter with a current rating of 4 A. However, the
power supply tracks on the DVK hardware are designed to support up to 8 A of input current. The
CYUSB3314-88LTXC
Downstream
Port 1
Upstream Port
Downstream
Port 2
Downstream
Port 3
Downstream
Port 4
D+ /
D
-
D+ /
D
-
D+
/
D
-
D+
/ D
-
D
+
/
D
-
I2C
EEPROM
5V DC
Jack
External Reset
Generation
Logic
26MHz
Crystal
XTAL_IN
XTAL_OUT
Dual channel
Power Switch
DS
3_O
VRC
URR
DS
4_O
VRC
URR
D
S
3_
P
W
REN
D
S
4_
P
W
REN
D
S
1_
P
W
REN
D
S
2_
P
W
REN
Dual channel
Power Switch
I2
C B
U
S
Port indicator
LEDs
RE
SE
T
N
D
S
1_
OVRCUR
R
D
S
2_
OVRCUR
R
3.3V
Regulator
1.2V
Regulator
AVDD33
AVDD12
SSR
x /
SST
x
SSR
x /
SS
Tx
SS
Rx /
SST
x
SSRx /
SS
T
x
SS
Rx
/
SS
T
x
Power lines
USB 3.0 lines
USB 2.0 lines
Signal lines
12
2
Содержание CY4603
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