mc13109 Freescale Semiconductor, Inc, mc13109 Datasheet - Page 19

• Manufacturer Part Number: mc13109
• Description: Universal Cordless Telephone Subsystem
• Manufacturer: Freescale Semiconductor, Inc

Power Saving Operating Modes
conserve power in order to prolong battery life. There are five
modes of operation; Active, R x , Standby, Interrupt and
Inactive. In Active Mode, all circuit blocks are powered. In R x
mode, all circuitry is powered down exept for those circuit
Figure 19. Mute and Disable Control Bit Descriptions
MOTOROLA ANALOG IC DEVICE DATA
ALC Disable
Limiter Disable
Clock Disable
T x Mute
R x Mute
SP Mute
When the MC13109 is used in a handset, it is important to
Disable
ALC
1
0
1
0
1
0
1
0
1
0
1
0
Used
Not
LO 2 Out
U.K. Handset
LO 2 In
Select
Automatic Level Control Disabled
Normal Operation
Limiter Disabled
Normal Operation
MPU Clock Output Disabled
Normal Operation
Transmit Channel Muted
Normal Operation
Receive Channel Muted
Normal Operation
Speaker Amp Muted
Normal Operation
0
0
1
1
Disable
Limiter
U.K. Handset
LO 2
Select
Figure 17. Reference Register Programming Mode
U.K. Base
Disable
Select
Clk
0
1
0
1
U.K. Base
Select
Programmable
Figure 18. Control Register Bits
Reference
Clk Out
T x Divider
Counter
Select
2–Bit
12–b
Value
25
1
4
4
14–Bit Reference Counter Latch
MSB
MC13109
R x Divider
25
1
4
Value
25
Volume
Control
1
4
4
4–Bit
sections needed to receive a transmission from the base. In
the Standby and Interrupt Modes, all circuitry is powered
down except for the circuitry needed to provide the clock
output for the microprocessor. In Inactive Mode, all circuitry is
powered down except the MPU interface. Latch memory is
maintained in all modes. Figure 20 shows the control register
bit values for selection of each power saving mode and
Figure 21 show the circuit blocks which are powered in each
of these operating mode.
12–Bit Ref Counter
Stdby
Mode
Bit
0
0
1
1
1
Netherlands Base and Hand Set
Stdby
Mode
Figure 20. Power Saving Mode Selection
All but U.K. and Netherlands
U.K. Base
U.K. Handset
U.K. Base
U.K. Handset
Mode
R x
Bit
0
1
0
1
1
U.K. Hand Set
U.K. Base Set
Application
Mode
R x
T x Reference Frequency
1 or High Impedance
“CD Out/Hardware
R x Reference Frequency
Interrupt” Pin
Mute
LSB
T x
X
X
X
0
Mute
R x
Mute
SP
Power Saving
Standby
Inactive
Inactive
Active
Mode
R x
19