IA4420 Datasheet, PDF (15/29 Pages) List of Unclassifed Manufacturers – Universal ISM Band FSK Transceiver

Bits 9-8 (d1 to d0): VDI (valid data indicator) signal response time setting:
d1 d0
00
01
10
11
Response
Fast
Medium
Slow
Always on
IA4420
CR_LOCK
DRSSI
DQD
DRSSI
DQD
CR_LOCK
CR_LOCK
DQD
d0
d1
FAST
SEL0
SEL1
IN0
MEDIUM
IN1
Y
VDI
SLOW
IN2
LOGIC HIGH
IN3
MUX
SET Q
R/S FF
CLR
Bits 7-5 (i2 to i0): Receiver baseband bandwidth (BW) select:
i2 i1 i0
000
001
010
011
100
101
110
111
BW [kHz]
reserved
400
340
270
200
134
67
reserved
15