MC33591MOD434 Freescale Semiconductor, MC33591MOD434 Datasheet - Page 12

• Manufacturer Part Number: MC33591MOD434
• Description: BOARD EVALUATION FOR MC33591 RX
• Manufacturer: Freescale Semiconductor
• Type: Receiverr

Specifications of MC33591MOD434

• Contents: Module and Misc Hardware
• For Use With/related Products: MC33591 434 MHz RF Module
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

STATE MACHINES
the mixer runs at f
STATE MACHINES
AFTER POR RESET STATE MACHINE
receiver is enabled. The crystal oscillator is running and generates the clock for the SPI. This implies that before
the circuit is in sleep mode, a delay corresponding to the crystal oscillator wake-up time must be inserted
between the falling edge on RESETB and the start of the transmission on the SPI lines. The local oscillator is
running as well. This means that demodulated data can be read on DMDAT but are not sent by the SPI.
telegram or receiving one.
sampling clock at 615kHz (sampling period Ts=1.6µs), derivated from the crystal oscillator. The transition time
between state 1 and states 2 or 6 is less than 3
12
The combination MG=1, MS=1 is forbidden in any application. It configures the receiver in a test mode where
There are 3 different modes for the receiver.
Sleep mode corresponds to the low power consumption mode:
Configuration mode is used for writing or reading the internal registers. In this mode, the SPI is slave and the
In Run mode, the receiver is enabled (crystal and local oscillators are running). It is either waiting for an RF
Figure 14 details the state machine after Power On Reset (POR). The state machine is synchronized by a
- MG sets the mixer gain:
- MS switches the MIXOUT pin:
- PG sets the phase comparator gain (see “The local oscillator PLL” chapter, page 4):
- if SOE=0, the whole receiver is shutdown,
- if SOE=1, the strobe oscillator remains active.
0 = Normal,
1 = -17dB (typical).
0 = To the mixer output,
1 = To the IF input.
0 = High gain mode,
1 = Low gain mode.
VCO
/4.
MG
0
0
1
1
MS
Table 10: Mixer and MIXOUTconfiguration
Freescale Semiconductor, Inc.
0
1
0
1
For More Information On This Product,
DR1
0
0
1
1
MC33591 Technical Data
Table 9: Data Rate selection
DR0
Go to: www.freescale.com
Mixer Gain
0
1
0
1
Reduced
´
Normal
Normal
Forbidden, mixer test mode only
Ts.
Selected Ratio
8.6 - 10.6 kBd
1.0 - 1.4 kBd
2 - 2.7 kBd
4 - 5.3 kBd
Mixer output
Mixer output
MIXOUT
IF input
MOTOROLA