th7122 Melexis Company, th7122 Datasheet - Page 25

• Manufacturer Part Number: th7122
• Description: Transceiver - 27 To 930mhz, Fsk/fm/ask, Multi-channel Lqfp32
• Manufacturer: Melexis Company

5.1.5
39010 07122
Rev. 008
MODCTRL
ERTM
LDTM
Name
NT
D – word
[18:17]
[20:19]
[16:0]
Bits
[21]
64d .. 131071d
00
01
10
11
00
01
10
11
0
1
external modulation control
Modulation will be set via pin ASK/FSK.
internal modulation control
Modulation will be set via bit MODSEL (bit 19 in A-word). Nevertheless pin ASK/FSK must be
connected to either VCC or VEE.
256 clocks
16 clocks
16 clocks
64 clocks
2 clocks
4 clocks
8 clocks
4 clocks
Feedback divider ratio in TX operation mode
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Page 25 of 44
Set the unlock condition of the PLL
Set the lock condition of the PLL
Set mode of modulation control:
Set the maximum allowed number of reference clocks
(1/f
DOWN) can be in-consecutive.
Set the minimum number of consecutive edges of phase
detector output cycles, without appearance of any unlock
condition.
RO
Description
) during the phase detector output signals (UP &
FSK/FM/ASK Transceiver
27 to 930MHz
TH7122
Data Sheet
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June/07