mc68hc908qf4 Freescale Semiconductor, Inc, mc68hc908qf4 Datasheet - Page 107

• Manufacturer Part Number: mc68hc908qf4
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

12.8 Power Management
12.9 Data Clock
12.10 Application Information
12.10.1 Application Schematics in OOK and FSK Modulation
MC68HC908QF4 — Rev. 1.0
MOTOROLA
NOTE:
When the battery voltage falls below the shutdown voltage threshold (V
whole circuit is switched off.
After this shutdown, the circuit is latched until a low level is applied on pin ENABLE
(see state 6 under
When the data clock starts, the high-to-low ratio may be uneven. Similarly the clock
is switched off asynchronously so the last period length is not guaranteed.
This subsection provides application information for the usage of the UHF
transmitter module.
Figure 12-5
modulation for the 315-MHz and 434-MHz frequency bands. For 868-MHz band
application, the input pin BAND must be wired to GND. See component description
in
Table 12-4
V
CC
C6
Freescale Semiconductor, Inc.
For More Information On This Product,
TO MCU
Y1
Figure 12-5. Application Schematic in OOK Modulation,
and
and
PLL Tuned UHF Transmitter Module
Figure 12-6
Go to: www.freescale.com
Table
12.7 State
315-MHz and 434-MHz Frequency Bands
R2
12-5.
DATACLK
DATA
BAND
GND
XTAL1
XTAL0
R
EXT
show application schematics in OOK and FSK
Machine).
ENABLE
GNDRF
RFOUT
MODE
CFSK
V
V
CC
CC
NC = NO CONNECTION
NC
PLL Tuned UHF Transmitter Module
C7
V
CC
C8
MATCHING
NETWORK
Power Management
SDWN
ANTENNA
Data Sheet
) the
107