MC33696MOD315EV Freescale Semiconductor, MC33696MOD315EV Datasheet - Page 42

• Manufacturer Part Number: MC33696MOD315EV
• Description: MCU, MPU & DSP Development Tools MC33696 (ECHO) RF C EVAL
• Manufacturer: Freescale Semiconductor

Specifications of MC33696MOD315EV

• Processor To Be Evaluated: MC9S08RG60
• Interface Type: RS-232
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Register Description
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,
FRM = 1 (Direct Access)
Whatever type of modulation is used (OOK or FSK), F[11:0] defines the receiver local oscillator frequency
F
42
LO
•
•
•
•
, and,
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 16
Then, two frequencies are calculated internally, as follows.
— F
— F
FTA[11:0] and FTB[11:0] are not used
if OOK modulation is used (MODU = 0):
— FTA[11:0] define the carrier frequency F
— FTB[11:0] are not used
if FSK modulation is used (MODU = 1):
— FTA[11:0] define the carrier frequency F
— FTB[11:0] define the carrier frequency F
carrier0
carrier1
gives a numerical example in the 434 MHz band (CF[1:0] = 01).
= F[11:0] - Δf to transmit a logical 0
= F[11:0] + Δf to transmit a logical 1
Table 16. Frequency Numerical Example (434 MHz Band)
LO
is then set automatically to F
CF[1:0]
FSK[3:0]
00, 01
Table 15. Frequency Deviation Definition
0000
0001
0010
1111
11
...
MC33696 Data Sheet, Rev. 12
Frequency Deviation Δf
F
F
Frequency Deviation Δf
ref
ref
x(FSK[3:0]+1)/ 1024
x(FSK[3:0]+1)/ 2048
carrier
carrier0
carrier1
± 192 kHz
± 12 kHz
± 24 kHz
± 36 kHz
carrier
...
to transmit a logical 0
to transmit a logical 1
+ F
Table
IF
(with F
15.
IF
= intermediate frequency).
Freescale Semiconductor
carrier
. The