UM-B-074
DA1468x Range Extender Daughterboard
User Manual
Revision 1.1
17-Apr-2018
CFR0012
16 of 60
© 2018 Dialog Semiconductor
The control signal timing aims to keep the signals at logic 0 as long as possible to achieve better
power results. This can be achieved by assigning the control signals to DCF timers (see
Table 7
)
Decoding of the signals results in the following signal description:
●
CTX: Enable any TX related operation
●
CRX: Enable any RX related operation
●
CHL: Define TX High (1) or Low (0) power mode
●
CPS: Enable bypass TX/RX mode
●
CSD: Enable FEM
7.1.2
GPIO Setup
The RF Control Unit (RFCU) of DA14680/681 provides the capability of controlling five signals which
can be used for controlling the SKY66112-11. The DCFs can be output on any GPIO by using PID
numbers 55 to 59. The five DCF signals can be extracted from the RFCU to any pin by programming
the PID values in the Pxx_MODE_REG registers, as follows:
Table 6: DCF Signal Configuration
Function
PORT0_DCF
PORT1_DCF
PORT2_DCF
PORT3_DCF
PORT4_DCF
PID
55
56
57
58
59
Figure 10: DCF Signal Programming
Table 7: SKY66112-11 Control Signal and DCF Timer Configuration
Mode
DA1468x GPIO
SKY66112-11
Comments
FEM enable
P4_3
CSD
GPIO or DCF timer 29 (PORT2_DCF)
TX enable
P4_5
CTX
DCF timer 27 (PORT0_DCF)
PA High Gain
P4_4
CHL
GPIO or DCF timer 31 (PORT4_DCF)
RX enable
P4_2
CRX
DCF timer 28 (PORT1_DCF)
