MRF49XA Datasheet, PDF (38/102 Pages) Microchip Technology – ISM Band Sub-GHz RF Transceiver

MRF49XA
REGISTER 2-13: PMCREG: POWER MANAGEMENT CONFIGURATION REGISTER
(POR: 0x8208)
R/W-1
bit 15
R/W-0
R/W-0
R/W-0
R/W-0
CCB<15:8>
R/W-0
R/W-1
R/W-0
bit 8
R/W-0
RXCEN
bit 7
R/W-0
BBCEN⁽¹⁾
R/W-0
TXCEN
R/W-0
SYNEN
R/W-1
OSCEN
R/W-0
LBDEN
R/W-0
WUTEN⁽³⁾
R/W-0
CLKOEN
bit 0
Legend:
R = Readable bit
-n = Value at POR
r = reserved bit
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-8
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
CCB<15:8>: Command Code bits
The command code bits (10000010b) are serially sent to the microcontroller to identify the bits to be
written in the PMCREG.
RXCEN: Receiver Chain Enable bit
The receiver chain consists of a baseband circuit, synthesizer and crystal oscillator.
1 = Enables receiver chain
0 = Disables receiver chain
BBCEN: Baseband Circuit Enable bit⁽¹⁾
The baseband circuit, synthesizer and oscillator work together to demodulate and recover the data
transmitted to the synthesizer (SYNEN bit). The OSCEN bit must be enabled along with the baseband
circuits in order to receive data.
1 = Enables baseband circuit
0 = Disables baseband circuit
TXCEN: Transmit Chain Enable bit
The transmit chain consists of power amplifier, synthesizer, oscillator and transmit register.
1 = Enables the transmitter chain and starts transmission (if the TX register is enabled)
0 = Disables transmitter chain
SYNEN: Synthesizer Enable bit
The synthesizer consists of a PLL, oscillator and VCO for controlling the channel frequency.
1 = Enables the synthesizer
0 = Disables the synthesizer
OSCEN: Crystal Oscillator Enable bit
1 = Enables the crystal oscillator
0 = Disables the crystal oscillator
LBDEN: Low Battery Detector Enable bit
The battery detector can be programmed to 32 different threshold levels.⁽²⁾
1 = Enables the battery voltage detector circuit
0 = Disables the battery voltage detector circuit
WUTEN: Wake-up Timer Enable bit⁽³⁾
1 = Enables the wake-up timer circuit
0 = Disables the wake-up timer circuit
Note 1:
2:
3:
4:
This bit can be disabled to reduce current consumption.
See BCSREG (Register 2-16) for programming details.
See WTSREG (Register 2-14) for details on programming the wake-up timer value.
If the CLKOEN bit is cleared by enabling the clock output, the oscillator continues to run even if the
OSCEN bit is cleared. The device will not fully enter into the Sleep mode.
DS70590B-page 36
Preliminary
© 2009 Microchip Technology Inc.