mc33696fje/r2 Freescale Semiconductor, Inc, mc33696fje/r2 Datasheet - Page 34

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

Configuration, Command, and Status Registers
FRM = 1 (Direct Access)
Whatever type of modulation is used (OOK or FSK), F[11:0] defines the receiver local oscillator frequency
F
Table 18
desired frequency value F (in Hz).
Conversely,
frequency registers F[11;0].
17.4 Receiver On/Off Duration Register
Figure 25
RON[3:0] (Receiver On) define the receiver on time (after crystal oscillator startup) as described in
Section 14, “Receiver On/Off
34
LO
Reset Value
Bit Name
•
•
, and,
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
defines the value to be binary coded in the frequency registers F[11;0], FTA/B[11:0], versus the
describes the receiver on/off duration register, RXONOFF.
Table 19
CF[1:0]
00, 01
11
Bit 7
—
0
gives the desired frequency F and the frequency resolution versus the value of the
Table 18. Frequency Register Value versus Frequency Value F
Table 19. Frequency Value F versus Frequency Register Value
CF[1:0]
00, 01
11
RON3
Bit 6
1
(35 + F[11;0]/2048)xF
RON[3:0]
(35 + F[11;0]/2048)xF
Control.”
0000
0001
0010
Frequency (Hz)
...
Table 20. Receiver On Time Definition
RON2
Figure 25. RXONOFF Register
Bit 5
1
MC33696 Data Sheet, Rev. 9
Receiver On Time: N x 512 x T
ref
RON1
ref
Bit 4
Frequency Register Value
/2
1
(2 x F/F
carrier
carrier0
carrier1
(F/F
Forbidden value
ref
ref
-35) x 2048
RON0
Bit 3
to transmit a logical 0
to transmit a logical 1
-35) x 2048
1
...
1
2
Frequency Resolution (Hz)
ROFF2
Bit 2
1
F
F
ref
ref
digclk
/4096
/2048
ROFF1
Bit 1
1
Freescale Semiconductor
ROFF0
Bit 0
1
Addr
$09