UM-B-074
DA1468x Range Extender Daughterboard
User Manual
Revision 1.1
17-Apr-2018
CFR0012
8 of 60
© 2018 Dialog Semiconductor
4.2
System Description
The system consists of:
●
DA14680 or DA14681 SoC in aQFN60 package (the main implementation and testing was done
with DA14681)
●
Sky66112-11 RF Front End Module (SKY66112-11_203225G)
●
QSPI Data Flash memory (dual package wlcsp-w25q80ew, soic8-W25Q80EWSNIG-default)
●
Crystals 16 MHz (or 32 MHz) and 32.768 kHz
●
Can be supplied from a Li-Poly battery
●
Mating headers for connecting to a DA1468x PRO Motherboard
A system overview is shown in
Figure 2
.
Sky66112-11
16 MHz CRYSTAL 32.768 kHz CRYSTAL
DA1468x/1510x SoC
Matching
circuit
TX/RX path
Matching
circuit
CSD
CPS
CTX
CRX
CHL
ANT_SEL
1V8 1V8P
Qspi flash
V33
Resistive
attenuator (1)
Low pass
filter (2)
Debug
interface
DA1468x/ 1510x
PMU
FEM control signals
6
V
C
C
1
V
C
C
2
V
D
D
V33_FEM (4)
Sky66112-11
TX Power control
circuit (3)
1V8
1V8P
VCC2_PA
1V8P
VCC1_PA
V33
VDD_PA
FEM_VCC2
FEM_VCC2
V
C
C
1
_
P
A
V
D
D
_
P
A
V
C
C
2
_
P
A
Legend:
(1) Resistive attenuator application is possible.
(2) Low pass filter application is possible.
(3) RF TX Output Control Circuit.
(4) Only for DA1510x.
Figure 2: Block Diagram of Range Extender (224-23-D)
4.3
System Interface
DA14680/681 Range Extender daughterboard is plugged on headers J1, J2 of DA1468x PRO
motherboard, as shown in
Figure 3
.
The PRO motherboard provides UART and JTAG (SWD) interfaces to the DA14680/681, current
measurement circuitry, as well as breakout headers (J3, J4) for the available GPIOs and general
purpose user peripherals. For more details on the functionality and specifications of the motherboard,
refer to user manual UM-B-060 (Ref.
[2])
.
The system is powered via the Debug USB port (USB2). The daughterboard can also be
independently programmed using an external battery connected to the on board Li-Poly battery
connector (see section
5
for more details). The layout and main features of the daughterboard are
shown in
Figure 4
.
