UM-B-114
DA14531 Development Kit Pro Hardware User Manual
User Manual
Revision 1.4
23-Apr-2020
18 of 82
© 2021 Dialog Semiconductor
4.2.1 USB HUB (U11)
The USB HUB of DA14531 PRO-MB is implemented by U11, USB2512B. This chip is supplied with
3.3 V from U13.
The signal PWR_ENABLE is generated from U11 and it is an active high signal. It enables the power
components (LDOs and DCDC converter) for UART, JTAG, and the current sensing circuit. The
system will power up only after the USB HUB has enumerated properly.
Its operation is indicated via the green LED D4 on DA14531 PRO-MB. A 24 MHz crystal (Y3) is
required for the chip operation.
Figure 12: USB HUB Circuitry of DA14531 PRO-MB
4.2.2
USB to UART (U12)
The USB to UART function is implemented by U12, FT2232HL. This chip is supplied with 3.3 V from
U14. A 12 MHz crystal (Y4) is required for the chip operation.
Functions served by U12 are the following:
●
Connecting a PC to the UART port of DA14531 SoC
●
Connecting a PC to the current sensing circuitry:
○
SPI connection with ADC (U8)
○
Software cursor triggering (C_TRIG)
●
Reset capability of the DA14531 SoC through the T_RESET signal (not enabled)
R55
330
TP74
VBUS1
USBDP
R49
100.0K
R50
100.0K
TP20
PWR_EN
R56
100.0K
C59
100nF
C63 18pF
R60
10.0k
C66
100nF
R66
10.0k
USB2512B-AEZG
U11
USBDM_DN1
1
USBDP_DN1
2
USBDM_DN2/PRT_DIS_M2
3
USBDP_DN2/PRT_DIS_P2
4
VD
D
33_1
5
NC1
6
NC2
7
NC3
8
NC4
9
VD
D
33_2
10
TEST
11
PRTPWR1/BC_EN1
12
OCS_N1
13
C
R
F
ILT
14
VD
D
33_3
15
PRTPWR2/BC_EN2
16
OCS_N2
17
NC5
18
NC6
19
NC7
20
NC8
21
SDA/NON_REM1/SMBDATA
22
VD
D
33_4
23
SMBCLK/CFG_SEL0/SCL
24
HS_IND/CFG_SEL1
25
RESET_N
26
VBUS_DET
27
SUSP_IND/LOCAL_PWR/NON_REM0
28
VD
D
33_5
29
USBDM_UP
30
USBDP_UP
31
XTALOUT
32
XTALIN/CLKIN
33
PLLFILT
34
RBIAS
35
VD
D
33_6
36
GN
D
GN
D
Y 3
24.0000MHZ
C62
100nF
R46
10.0k
D4
Led_Green
2
1
R59
NP
R64
NP
R48
100.0K
L1
CMC 400MA
1
4
2
3
R47
100.0K
C56
100nF
C64 18pF
R58
10.0k
C65
1.0uF
R51
100.0K
R62
NP
VDD_3V3_HUB
VBUS_HUB
VDD_3V3_HUB
VBUS_HUB
R124
NP
USBDM
USBDM_2
USBDP_2
USB HUB
R129
1.00K
C58
100nF
1
2
3
4
5
USB1
USBDP_1
USBDM_1
D7
PRTR5V0U2X,215
GND
1
IO1
2
IO2
3
VCC
4
TP36
USBLED
C73
100nF
C69
100nF
C72
100nF
C68
100nF
C70
100nF
C71
100nF
VDD_3V3_HUB
R54
12.0k
PWR_ENABLE
C57
4.7uF