micrf500blq Micrel Semiconductor, micrf500blq Datasheet - Page 17

• Manufacturer Part Number: micrf500blq
• Description: 700mhz To 1.1ghz Radiowire? Rf Transceiver
• Manufacturer: Micrel Semiconductor

Example 2. f
tion is applied to the VCO.
March 2003
MICRF500
Rx
Rx
Rx
Rx
Rx
Tx
Tx
Tx
Tx
Tx
OutS1
RxFilt
Ref6
Ref0
A1
50
50
0
0
0
0
0
0
0
0
RF
= 869.0MHz, f
Cpmp1 Cpmp0
OutS0
Ref5
Pa2
A0
50
50
1
1
0
0
0
0
0
0
Mod1
Ref4
Pa1
135
135
N1
1
1
0
0
1
1
0
0
RF
= 10.00MHz. FSK modula-
Mod0
Ref3
Pa0
135
135
Fc1
N0
1
1
0
0
1
1
0
0
Ref2
100
100
Fc0
M1
RT
Gc
1
1
0
0
0
0
1
0
ByLNA
OutS2
Ref1
100
100
M0
Pu
0
0
0
0
0
0
1
1
17
Binary form: (MSB to the left):
Tx:
Rx:
With modulation applied to the VCO, A, N and M values
corresponding to the receive frequency have to be found. The
same set of A, N and M values are used in all modes.
Programming After Battery Reset
In order to ensure a successful programming after V
been zero volts, the P
first programming sequence. This can be done by a separate
110-line from a microcontroller, or a RC circuit on the P
pin to V
latter method, R and C values need to be chosen so that the
voltage on the P
controller word is loaded into the parallel register (see Figure
10).
110010 110010 000010000111
000010000111 0001100100 0001100100
01011110000000010100000011
111011 111011 000010001110
000010001110 0001101010 0001101010
01011110000000010100000001
DD
(A capcitor between P
DEXT
DEXT
pin is lower than V
needs to be kept low during the
DEXT
and V
DD
DD
/2 when the
). Using the
MICRF500
DD
Micrel
DEXT
has