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Chip-dat/Nordic-dat/NRF52840-dat/NRF52840-dat.md
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@@ -41,12 +41,6 @@
41 41
- 4x 32-bit timers, RTC, watchdog, and more
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43 43
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-## module info
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-
46
-- free GPIO == 29
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-- flash = 1MB
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-
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-![](2025-06-19-13-53-11.png)
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## drive
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@@ -123,12 +117,14 @@
123 117
- button == P1.10
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- REST == P0.18/RESET
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+## SCH2 Module
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+![](2025-07-09-15-30-56.png)
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128 124
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## ref
131 127
132
-- [[bluetooth-dat]]
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+- [[bluetooth-dat]] - [[nrf52840]]
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134 130
- [[nordic-dat]]
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@@ -0,0 +1,31 @@
1
+
2
+# NRF52840-mod-dat
3
+
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+- [[NRF52840-dat]]
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+
6
+## module info
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+
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+- free GPIO == 29
9
+- flash = 1MB
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+
11
+![](2025-06-19-13-53-11.png)
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+
13
+
14
+## NRF52840-mod-DFN
15
+
16
+![](2025-07-09-15-24-09.png)
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+
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+![](2025-07-09-15-30-01.png)
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+
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+![](2025-07-09-15-30-19.png)
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+
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+### reference desgin
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+
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+![](2025-07-09-15-32-25.png)
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+
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+- [[antenna-dat]]
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+
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+
29
+## ref
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+
31
+- [[NRF52840-mod]]
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Tech-dat/antenna-dat/antenna-DAT.md
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@@ -123,6 +123,14 @@ A Bias-T consists of three ports:
123 123
It works by using inductors and capacitors. The inductor blocks the RF signal but allows DC to pass, while the capacitor blocks DC but allows the RF signal to pass. This way, the antenna can operate without interference from the power supply.
124 124
125 125
126
+## Antenna on PCB reference design
127
+
128
+Therefore, the layout of the module antenna location and routing is recommended as follows:
129
+1. Place the antenna on the edge (corner) of the PCB.
130
+2. Make sure that there is no signal line or copper foil in each layer below the antenna.
131
+3. It is best to hollow out the antenna position in the following figure to ensure that the S11 of themoduleisminimally affected.
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+
133
+![](2025-07-09-15-34-06.png)
126 134
127 135
## ref
128 136