Rainbow Electronics RC1090 - Manual (Page 3)

RC1040/1080/1090
 2005 Radiocrafts AS RC1040/RC1080/RC1090 Data Sheet (rev. 1.3) Page 3 of 17
Pin Assignment
GND
CTS/RXEN/RXTX
RTS/TXEN
CONFIG
TXD/SCL
RXD/SDA
GND
GND
VCC
ON/OFF
VDD
GND
RF
GND
1
2
3
4
5
6
7
14
13
12
11
10
9
8
15 16 17 18 19 20 21 22
30 29 28 27 26 25 24 23
Pin Description
Pin no Pin name Description
1 GND System ground
2 CTS/RXTX/RXEN UART Clear to Send, UART RXTX, Receive Mode Enable, or SLEEP
mode activation. Connect to VDD if not used. Internal 100 k series
resistor.
3 RTS/TXEN UART Request to Send, Transmit Mode Enable, or SLEEP mode
activation. Connect to VDD if not used. Internal 100 k series
resistor.
4 CONFIG Configuration Enable. Active low. Should normally be set high.
Connect to VDD if not used. Internal 100 k series resistor.
5 TXD/SCL UART TX Data, or serial data clock. Internal 100 k series resistor.
6 RXD/SDA UART RX Data, or serial data I/O. Internal 100 k series resistor.
7 GND System ground
8 GND System ground
9 RF RF I/O connection to antenna
10 GND System ground
11 VDD Supply voltage output, regulated. Should normally be left open
12 ON/OFF Module on/off (shutdown). ON when high, OFF when low. See
important note under Power Management page 5.
13 VCC Supply voltage input. Internally regulated. Maximum rise-time
requirement apply, see Electrical Specification.
14 GND System ground
15-18 RESERVED Test pins or pins reserved for future use. Do not connect!
19 RSSI Received signal strength indicator, analogue output
20-21 RESERVED Test pins or pins reserved for future use. Do not connect!
22 RESET Main reset (active low). Should normally be left open. Internal 100 k
pull-up resistor, no series resistor.
23-30 RESERVED Test pins or pins reserved for future use. Do not connect!
Note 1: In UART mode the TXD and RXD are used for serial data, and CTS/RXTX and RTS for flow control
(optional). If flow control is not used, and RXEN and TXEN are both asserted (active low) the module is set in SLEEP
mode. RXEN and TXEN should be connected to VDD if not used if not used for SLEEP mode activation. A pull-up
resistor is not necessary due to an internal series resistor.
Note 2: In synchronous mode the SCL (data clock) and SDA (Data input and output) are used for serial data.
The RXEN and TXEN pins are then used to select the operation mode of the device. Signals are active low.
Note 3: The CONFIG pin is used to enter configuration mode (change of default settings). Active low.
Note 4: Do not use VDD for supply to external circuits. Should only be used for RXEN and TXEN pull-up, if required.
Note 5: RXEN, TXEN, CONFIG, TXD and RXD have internal 100 k series resistors.
Note 6: Other digital interfaces may be specified upon request.