W55RFS27T1B Datasheet, PDF (4/15 Pages) Winbond – SUPER-REGENERATION RF TRANSMITTER

W55RFS27T1B DataSheet
1.2 W55RFS27T1B Pad Definition
1.2.1 Pad Description
Symbol
S3
S4
CKSEL0
TEST
CKSEL1
ANT
GND
VDD
RESET
X1
X2
ID1
ID0
TXOUT
S1/~TXD
S2/~ENB
Pad I/O
Functional Description
No.
1
I
Manual-mode input, internally pull-high
2
I
Manual-mode input , internally pull-high
3
I
Clock source frequency select LSB (please see section 1.2.2 for setup)
4
I
TEST=0 for 6-function mode, TEST=1 for 4-function mode
5
I
Clock source frequency select MSB (please see section 1.2.2 for setup)
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=0 resets whole chip, internally pull-high
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 (please see section 1.2.3 for setup)
13
I
ID setting LSB (please see section 1.2.3 for setup)
14
O
TXD Data output
15
I
Manual-mode input or uC-mode: ~TXD, internally pull-high
16
I
Manual-mode input or uC-mode: ~ENB, internally pull-high
1.2.2 Clock Frequency Select (CKSEL) Setup
(CKSEL1,CKSEL0)
(0,0)
(0,1)
(1,0)
(1,1)
Clock Frequency
27.145MHz
35.48 MHz
40.68 MHz
49.86 MHz
4
Revision: A3.0
Publish Date: Feb. 2010