參數(shù)資料
型號(hào)： MC13109A
廠商： Motorola, Inc.
英文描述： UNIVERSAL CORDLESS TELEPHONE SUBSYSTEM IC
中文描述： 通用無繩電話子系統(tǒng)集成電路
文件頁(yè)數(shù)： 17/28頁(yè)
文件大?。?/td> 1307K
代理商： MC13109A
MC13109A
17
MOTOROLA RF/IF DEVICE DATA
1. (00000001)
Latch Address
U.K. Handset
Select
2. (00000010)
3. (00000011)
4. (00000100)
5. (00000101)
7. (00000111)
14–Bit Tx Counter
MSB
LSB
MSB
LSB
MSB
LSB
MSB
LSB
MSB
LSB
14–Bit Rx Counter
12–Bit Reference Counter
5–Bit CD Threshold Control
4–Bit Test Mode
3–Bit 1st LO
Capacitor Selection
14–Bit
Volume
Control
U.K. Base
Select
ALC
Disable
Not
Used
Limter
Disable
Clk
Disable
MPU
Clk1
MPU
Clk0
Stdby
Mode
Rx
Mode
Tx
Mute
Rx
Mute
SP
Mute
Tx Counter Latch
Rx Counter Latch
Reference Counter Latch
Mode Control Latch
Threshold Control Latch
7–Bit Auxillary Latch
6. (00000110)
Figure 11. Microprocessor Interface Data Latch Registers
Reference Frequency Selection
The “LO2 In” and “LO2 Out” pins form a reference oscillator
when connected to an external parallel–resonant crystal. The
reference oscillator is also the second local oscillator for the
RF Receiver. Figure 12 shows the relationship between
different crystal frequencies and reference frequencies for
cordless phone applications in various countries.
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Reference Divider Values
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Crystal
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Divider
Value
Handset
Divider
Reference
Frequency
Frequency
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Reference Counter
Figure 13 shows how the reference frequencies for the Rx
and Tx loops are generated. All countries except U.K. require
that the Tx and Rx reference frequencies be identical. In this
case, set “U.K. Base Select” and “U.K. Handset Select” bits
to “0”. Then the fixed divider is set to “1” and the Tx and Rx
reference frequencies will be equal to the crystal oscillator
frequency divided by the programmable reference counter
value. The U.K. is a special case which requires a different
reference frequency value of Tx and Rx.
For U.K. base operation, set “U.K. Base Select” to “1”. For
U.K. handset operation, set “U.K. Handset Select” to “1”. The
Netherlands is also a special case since a 2.5 kHz reference
frequency is used for both the Tx and Rx reference and the
total divider value required is 4096 which is larger than the
maximum divide value available from the 12–Bit reference
divider (4095). In this case, set “U.K. Base Select” to “1” and
set “U.K. Handset Select” to “1”. This will give a fixed divide
by 4 for both the Tx and Rx reference. Then set the reference
divider to 1024 to get a total divider of 4096.
Mode Control Register
Power saving modes, mutes, disables, volume control,
and microprocessor clock output frequency are all set by the
Control Register. Operation of the Control Register is
explained in Figures 14 through 21.
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