mc33696fje/r2 Freescale Semiconductor, Inc, mc33696fje/r2 Datasheet - Page 33

• Manufacturer Part Number: mc33696fje/r2
• Description: Mc33696 Pll Tuned Uhf Transceiver
• Manufacturer: Freescale Semiconductor, Inc

How these registers are used is determined by the FRM bit, which is described below.
FRM = 0 (User Friendly Access)
Whatever type of modulation is used (OOK or FSK), bits F[11:0] define the carrier frequency F
local oscillator frequency F
In addition,
Freescale Semiconductor
Reset Value
Reset Value
Reset Value
Bit Name
Bit Name
Bit Name
•
•
in the case of OOK modulation (MODU = 0):
— FSK[3:0], FTA[11:0], and FTB[11:0] are not used.
in the case of FSK modulation (MODU = 1):
— FSK[3:0] sets the frequency deviation Df as defined in
Table 17
Then, two frequencies are calculated internally, as follows.
— F
— F
FTA[11:0] and FTB[11:0] are not used
carrier0
carrier1
FTA11
Bit 23
Bit 15
FTB7
FTA3
gives a numerical example in the 434 MHz band (CF[1:0] = 01).
Bit 7
0
0
0
= F[11:0] - Δf to transmit a logical 0
= F[11:0] + Δf to transmit a logical 1
Table 17. Frequency Numerical Example (434 MHz Band)
FTA10
Bit 22
Bit 14
LO
FTB6
FTA2
Bit 6
1
0
0
is then set automatically to F
CF[1:0]
FSK[3:0]
00, 01
Table 16. Frequency Deviation Definition
0000
0001
0010
1111
11
...
Bit 21
Bit 13
FTB5
FTA9
FTA1
Bit 5
1
0
0
MC33696 Data Sheet, Rev. 9
Figure 24. FT Register
Bit 20
Bit 12
FTB4
FTA8
FTA0
Bit 4
Frequency Deviation Δf
F
F
Frequency Deviation Δf
1
0
0
ref
ref
x(FSK[3:0]+1)/ 1024
x(FSK[3:0]+1)/ 2048
± 192 kHz
± 12 kHz
± 24 kHz
± 36 kHz
carrier
FTB11
Bit 19
Bit 11
FTB3
FTA7
Bit 3
...
0
0
0
Configuration, Command, and Status Registers
+ F
Table
IF
FTB10
Bit 18
Bit 10
FTB2
(with F
FTA6
Bit 2
0
1
0
16.
IF
= intermediate frequency).
Bit 17
FTB9
FTB1
FTA5
Bit 9
Bit 1
0
1
0
Bit 16
FTB8
FTB0
FTA4
Bit 8
Bit 0
0
1
1
carrier
Addr
. The
$06
$07
$08
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