Dialog Semiconductor DA14530/1, Hardware User Manual

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UM-B-114
DA14531 Development Kit Pro Hardware User Manual
User Manual Revision 1.4 23-Apr-2020
29 of 82 © 2021 Dialog Semiconductor
Figure 23: SPI Data Flash Circuit in DA14531 DK Pro
5.3.4 UART
In the DA14531 DK PRO, UART is not enabled by default. Three modes can be used: single-wire
UART (section
0 ), 2-wire UART (section 5.3.4.2 ), or full UART (section 5.3.4.3 ). For the 2-wire or full
UART, the SPI data flash must be disabled.
Any GPIO pin can be set as UART. In the DA14531 DK PRO, specific pins are used for UART
signals (
Table 7 ). Use short cables on DA14531 PRO-MB to bridge J2 pins (P2_0 to P3_1) and pins
of J1 (odd pin-numbers).
Table 7: UART Signals Assignment in DA14531 DK PRO
Function
The signals
Comments
PRO-MB DA14531 PRO-DB
J2 FCGQFN24 WLCSP17
UTX 2-wire or Full Transmit P2_0 P0_0 P0_0
Signals reused for SPI
Data Flash
URX
2-wire or Full UART
Receive
P2_1 P0_1 P0_1
UCTS
2-wire or Full UART
Clear to Send
P2_3 P0_3 P0_3
URTS
2-wire or Full UART
Request To Send
P2_4 P0_4 P0_4
RxTx
Single wire UART
Receive and Transmit
P2_3 P0_3
P2_5 P0_5