ib technology
MicroRWD module interface circuit and pin out
RWD +5v
D2
R1, R3 1k Red LED
1
24
CTS
Tx
MCLR/Vpp
SW1
D1, Green LED
RWD +5v
Rx
0v GND
R2, R8
OP3
OP2
Micro
RWD
(MOD2)
OP0
OP1
R4, R9
AN3
AN1
RWD +5v
AN1
CON J9, 2 x 10 x 0.1 inch
pin header
CON J8
AN5
AN4
AN6
AN2
AN2
12
13
Red LED
Grn LED
OP3
OP2
USB SLEEP
USB CLK
OP1
OP0
MCLR/Vpp
Rx(Data)
Tx(Clk)
GND
For 125kHz antenna link AN1-AN5, AN2-AN6
For 13.56MHz ant’ link AN1-AN3, AN2, AN4
1 uH PCB antenna (L2)
0v GND
C12 = 22pF
USB PWREN
USB RESET
0v GND
5v
1
CTS
SW1
0v GND
5v
C19, 5-50pF
R6, 0R
C10 = 180pF
AN3
trimming
capacitor
C11 = 220pF
AN4
R7, 0R
C13 = 22pF
R5
C8, C9
AN5
ANT1, L3
27R
47pF
700uH Antenna
AN6
Through hole solder pads for wire coil connection.
47pF
CON J3, 0.1, 2-way pin
header, 5v stabilised supply
RWD+5v
L1, 22uH
C2, 470uF
low ESR
+5v
47nF
C20
C6
C5
0v GND
47nF
C1
C4
Link J2
0.1, 2-way pin header
CON J1, 9-12v DC, 2.5mm Power Jack
Socket (+ve centre pin )
7
LM1117 REG (U1)
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