W55RFS27T3 Datasheet, PDF (4/12 Pages) List of Unclassifed Manufacturers – Super-Regeneration RF Transmitter

W55RFS27T3 DataSheet
1.2 W55RFS27T3 Pad Description
1.2.1 W55RFS27T3 Pad Description
Symbol
S3
S4
CKSEL
TEST0
PTX
ANT
VSS1
VSPLY
RESET
X1
X2
ID1
ID0
TXOUT
S1/~TXD
S2/~ENB
Pad I/O
Functional Description
No.
1
I
Manual-mode input: F1 (2-state)
2
I
Manual-mode input: F2 (2-state)
3
I
CKSEL = "0"  27.145 MHz, CKSEL="1"  49.8 MHz
4
I
Reserved for chip testing only, must be connect to "0" when operating
5
I
Optional operating voltage: 3.3V~5.5V @ PTX=1; or 2.2V~3.4V @ PTX=0
6
O
RF signal output. An external matching circuit is necessary for connecting with
an antenna.
7 _Ground Ground return path
8
Power ^{Power path}
9
I
RESET (with internally pull-high, " 0 " reset)
10
I
Input of internal crystal oscillator to connect with an external crystal
11
O
Output of internal crystal oscillator to connect with an external crystal
12
I
ID setting (MSB) for Channel shared , ID0=ID1 = 1 enter uC-mode
13
I
ID setting(LSB) for Channel shared , ID0=ID1 = 1 enter uC-mode
14
O
TXD Data output
15
I
Manual-mode input: F/B (3-state) or uC-mode: ~TXD
16
I
Manual-mode input: L/R (3-state) or uC-mode: ~ENB
1.2.3 W55RFS27T3 input state v.s. encoder output function (Manual-mode only)
Input pin name \ State
S1
S2
S3
S4
Floating (pull high)
F=B=0
L=R=0
F1 = 0
F2 = 0
GND
F = 0, B = 1
L = 0, R = 1
F1 = 1
F2 = 1
TXOUT
F = 1, B = 0
L = 1, R = 0
(Note: F  Forward; B  Backward; L  Left-turn; R  Right-turn; F1, F2  Two User-defined function)
4
Revision: A3.0
Publish Date: Dec. 2010