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AN625
Rev. 0.1
89
3.5.86. MODEM_MOD_TYPE
Summary: Modulation Type
Purpose:
This property selects between OOK, FSK, 4FSK and GFSK modulation, modulation source, and tx direct mode control.
The modulator must be configured for one mode through the entire packet. If portions of the packet alternate between
FSK and 4FSK modes, the modem should be programmed to 4FSK mode.
Property: 0x2000
Default: 0x02
Fields:
TX_DIRECT_MODE_TYPE - default:0
0 = Direct mode operates in synchronous mode, applies to TX only.
1 = Direct mode operates in asynchronous mode, applies to TX only. GFSK is not supported.
TX_DIRECT_MODE_GPIO[1:0] - default:0x0
0 = TX direct mode uses gpio0 as data source, applies to TX only.
1 = TX direct mode uses gpio1 as data source, applies to TX only.
2 = TX direct mode uses gpio2 as data source, applies to TX only.
3 = TX direct mode uses gpio3 as data source, applies to TX only.
MOD_SOURCE[1:0] - default:0x0
0 = Modulation source is packet handler fifo
1 = Modulation source is direct mode pin
2 = Modulation source is pseudo-random generator
MOD_TYPE[2:0] - default:0x2
0 = CW
1 = OOK
2 = 2FSK
3 = 2GFSK
4 = 4FSK
5 = 4GFSK
Register View
MODEM_MOD_TYPE
7
6
5
4
3
2
1
0
TX_DIRECT_MODE_TYPE TX_DIRECT_MODE_GPIO[1:0]
MOD_SOURCE[1:0]
MOD_TYPE[2:0]
0
0x0
0x0
0x2
Summary of Contents for Si446 Series
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