mrf89xa Microchip Technology Inc., mrf89xa Datasheet - Page 18

• Manufacturer Part Number: mrf89xa
• Description: Ultra-low Power, Integrated Ism Band Sub-ghz Transceiver
• Manufacturer: Microchip Technology Inc.

2.6
This section summarizes the settings for each
operating mode of the MRF89XA to save power, based
on the operations and available functionality. The
timing requirements for switching between modes
described in Section 5.3 “Switching Times and
Procedures”.
TABLE 2-3:
TABLE 2-4:
DS70622B-page 18
MRF89XA
Sleep
Stand-by
FS
Receive
Transmit
CSCON
CSDAT
SDO
SDI
SCK
IRQ0
IRQ1
DATA
CLKOUT
PLOCK
Note 1:
Chip.Mode
Mode
Pin
2:
3:
MRF89XA Operating Modes
(Includes Power-Saving Mode)
High-Z if Continuous mode is activated; otherwise, Output.
Output if PLL_lock_en = 1; otherwise, High-Z.
Valid logic states must be applied to inputs at all times to avoid unwanted leakage currents.
(GCONREG<7:5>
CMOD<2:0> bits
High-Z
High-Z
High-Z
High-Z
Sleep
Mode
Input
Input
Input
Input
Input
Input
OPERATING MODES
PIN CONFIGURATION VS. CHIP MODE
000
001
010
011
100
Stand-by
Output
Output
Output
Output
Mode
Input
Input
Input
Input
Input
Input
(1)
(1)
(2)
SPI, POR.
SPI, POR, Top regulator, digital regulator, XO, CLKOUT (if activated through
CLKOREG).
Same as Stand-by + VCO regulator, all PLL and LO generation blocks.
Same as FS mode + LNA, first mixer, IF amplifier, second mixer set, channel filters,
baseband amplifiers and limiters, RSSI, OOK or FSK demodulator, BitSync and all
digital features if enabled.
Same as FS mode + DDS, Interpolation filters, all up-conversion mixers, PA driver,
PA and external PARS pin (pin 29) output for the PA choke.
FS Mode
Output
Output
Output
Output
Input
Input
Input
Input
Input
Input
(1)
(1)
(2)
Output
Receive
Output
Output
Output
Output
Mode
Input
Input
Input
Input
Input
Preliminary
(2)
Transmit
Output
Output
Output
Output
Mode
Input
Input
Input
Input
Input
Input
2.6.1
Table 2-3 lists the different operating modes of the
MRF89XA, which can be used to save power.
2.6.2
Table 2-4 lists the state of the digital I/Os in each of the
above described modes of operation, regardless of the
data operating mode (Continuous, Buffered, or
Packet).
(2)
Active Blocks
CSCON has priority over CSDAT.
Output only if CSCON or CSDAT = 0.
MODES OF OPERATION
DIGITAL PIN CONFIGURATION VS.
CHIP MODE
© 2010 Microchip Technology Inc.
Comment