MICRF219AAYQS TR Micrel Inc, MICRF219AAYQS TR Datasheet - Page 14

• Manufacturer Part Number: MICRF219AAYQS TR
• Description: IC RECEIVER QWIKRADIO 16QSOP
• Manufacturer: Micrel Inc
• Series: -r

Specifications of MICRF219AAYQS TR

• Frequency: 300MHz ~ 450MHz
• Sensitivity: -112.5dBm
• Data Rate - Maximum: -
• Modulation Or Protocol: ASK, OOK
• Applications: General Purpose
• Current - Receiving: 4.3mA
• Data Interface: PCB, Surface Mount
• Memory Size: -
• Antenna Connector: PCB, Surface Mount
• Features: RSSI Equipped
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 16-SSOP (0.154", 3.90mm Width)
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 576-3892-2; MICRF219AAYQSTR

Micrel, Inc.
* In desense mode, a fixed gain control voltage is applied to the mixer
and variable gain amplifier, and the automatic gain adjustment loop is
disabled.
Programming the device is accomplished by the use of
pins DO and SCLK. Normally, DO (Pin 10) is outputting
data and needs to switch to an input pin made by the
start sequence, as shown at Figure 7.
High at the SCLK pin tri-states the DO pin, enabling the
external drive into the DO pin with an initial low level.
The start sequence is completed by taking SCLK low,
then high while DO is low, followed by taking DO high,
then low while SCLK is high. The serial interface is
initialized and ready to receive the programming data.
SCLK frequency should be greater than 5KHz to avoid
automatic reset from internal circuitry.
July 2011
D0
D4
D6
0
1
1
1
1
D8
0
0
1
1
0
1
1
0
0
0
1
1
D3
D1
0
1
0
1
X
0
1
0
1
D5
D7
1
0
1
0
0
1
0
1
Demod Bandwidth (at 433.92MHz)
1625Hz
3250Hz
6500Hz
13000Hz
Set slice level
Slice Level 30%
Slice Level 40%
Slice Level 50%
Slice Level 60%
Set number of consecutive valid
bits before releasing DO
0 bit - default
4
8
16
D2
X
0
0
1
1
- default
Desense*
No Desense - default
6dB Desense
16dB Desense
30dB Desense
42dB Desense
- default
14
Bits are serially programmed starting with the most
significant bit (MSB = D19) if all bits are being
programmed until the least significant bit (LSB =D0) For
instance, if only the desense bits D0, D1, and D2 are
being programmed, then these are the only bits that
need to be programmed with the start sequence, D2, D1,
D0, plus the stop sequence. Or, if only the squelch bit
D17 is needed, then the sequence must be from start
sequence, D17 through D0 plus the stop sequence,
making
programmed as needed. It is recommended that all
parallel input pins (SEL0, SEL1, and SQ) be kept high
when using the serial interface. After the programming
bits are finished, a stop sequence (as shown in Figure 8)
is required to end the mode and re-establish the DO pin
as an output again. To do so, the SCLK pin is kept high
while the DO pin changes from low to high, then low
again, followed by the SCLK pin made low. Timing of the
programming bits are not critical, but should be kept as
shown below:
T1 < 0.1 us, Time from SCLK to convert DO to
input pin
T6 > 0.1 us, SCLK high time
T7 > 0.1 us, SCLK low time
T2, T3, T4, T5, T8, T9, T10 > 0.1 us
Figure 7. Serial Interface Start Sequence
Figure 8. Serial Interface Stop Sequence
sure
the
[e-mail]
other
bits
(besides
or [phone]
M9999-071811-A
MICRF219A
D17)
are