Datasheet
MC33411A/B
10
MOTOROLA RF/IF DEVICE DATA
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PIN FUNCTION DESCRIPTION (continued)
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Description
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Description
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Symbol/Type
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Pin
10 EN
(Input)
Enable
10
Tx PLL
V
CC
240
≈1.0 µA
Enable Input for the MCU Interface section.
Hysteresis threshold is within 0.5 V of ground and
V
CC
. See text for proper waveform required at this
pin.
11 CLK
(Input)
Same as Pin 10. Clock Input for the MCU Interface section.
Hysteresis threshold is within 0.5 V of ground and
V
CC
. Data is written or read out on clock’s rising
edge. Maximum clock rate is 2.0 MHz.
12 Data
(I/O)
Data
12
Tx PLL
V
CC
240
1.0 µA
Tx PLL
V
CC
Disable
Data
Data I/O line for the MCU Interface section. Both
address and data are provided to/from this pin.
Input threshold is within 0.5 V of ground and V
CC
.
Data is written or read out on clock’s rising edge.
13 MCU Clk Out
(Output)
Clk Out
13
Tx PLL
V
CC
1.0 k
Tx PLL
V
CC
The microprocessor clock output is derived from the
reference oscillator and a programmable divider
with divide ratios of 2 to 312.5. It can be used to
drive a microprocessor and thereby reduce the
number of crystals required in the system design.
The driver has an internal resistor in series with the
output which can be combined with an external
capacitor to form a low–pass filter to reduce
radiated noise on the PCB. This output also
functions as the output for the counter test modes.
1) For the MC33411A the Clk Out can be disabled
via the MCU interface.
2) For the MC33411B this output is always active
(on).
14 Gnd Digital Ground for the Data, MCU Clk Out, and F
ref
Out
digital Outputs. A direct connection to the ground
plane is strongly recommended.
NOTE: 1. All V
CC
pins must be within ±0.5 V of each other.
ARCHIVE INFORMATION
ARCHIVE INFORMATION
Fr
eescale S
emiconduct
or
, I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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