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868.35 MHz
Transceiver Module
Pin
8
Name
TX/RX
In/Out
In
Description
Logic Input (CMOS compatible). This pin, in 3G mode, selects the operation of the TR8001 . Pull this pin
‘High’ for Transmit Mode. Pull this pin ‘Low’ for Receive mode. Do not allow this pin to float.
Logic Input (CMOS compatible). This pin, in 3G mode, selects the operation of the TR8001. Pull this pin
9
OOK/ASK
In
‘High’ for OOK Transmit/Receive mode. Pull this pin ‘Low’ for ASK Transmit/Receive mode. Do not allow this
pin to float.
10
SLEEP
In
Logic Input (CMOS compatible). This pin, in 3G mode, puts the TR8001 into Sleep mode. Pull this pin ‘High’
for Sleep Mode. Pull this pin ‘Low’ for operation mode. Do not allow this pin to float.
Logic Input (CMOS compatible). This pin, in 3G mode, enables the Start Vector Recognition circuit. The
11
SVEN
In
TR8001 will not output a recovered clock on RXDCLK (pin 16) until the start vector, 0xE2E2, has been recog-
nized. Pull this pin ‘High’ to enable Start Vector Recognition. Pull this pin ‘Low’ then ‘High’ to reset the Start
Vector Recognition circuit. Do not allow this pin to float.
12
13
Not Used
Not Used
Keep this pin pulled ‘Low’.
Keep this pin pulled ‘Low’.
Logic Input (CMOS compatible). This pin, in 3G mode, selects the receive data rate of the DR8001. Pull this
14
4.8KBPS/
19.2KBPS
In
pin ‘High’ to select 4.8kbps. Pull this pin ‘Low’ to select 19.2kbps. Do not allow this pin to float.
NOTE: Operating at 19.2kbps will require the value of C4, C5 and R4 to change to accommodate the
higher data rate. See the TR8001 datasheet for recommended component values.
Logic Input (CMOS compatible). This pin sets the processor to operate in 3G mode. The power-up operating
configuration of the TR8001 device is controlled by the J2 jumper setting. When DC power is applied to the
15
3G SEL
In
DR8001 with J2 installed across 2-3, this pin should be pulled ‘High’ immediately after power-up to initiate 3G
mode. Failure to pull pin 15 ‘High’ after power-up will cause the processor to remain inactive. Pulling this pin
‘High’ wakes the processor for 3G mode operation. When DC power is applied to the DR8001 with J2 installed
across 1-2, this pin should be held ‘Low’ to operate in 2G mode. Do not allow this pin to float.
RXDCLK is the clock output from the data and clock recovery circuit. RXDCLK is a CMOS output. When the
radio’s internal data and clock recovery circuit is not used, RXDCLK is a steady low value. When the internal
16
RXDCLK
Out
data and clock recovery is used, RXDCLK is low until a packet start symbol is detected at the output of the
data slicer. Each bit following the start symbol is output at RXDATA on the rising edge of a RXDCLK pulse,
and is stable for reading on the falling edge of the RXDCLK pulse. Once RXDCLK is activated by the detec-
tion of a start symbol, it remains active until SVEN (pin 11) is reset. See Pin 11 description.
In 3G control mode, CFGDAT is a bi-directional CMOS logic pin. When CFG (Pin 19) is set to a logic 1, con-
figuration data can be clocked into or out of the radio’s configuration registers through CFGDAT using CFG-
CLK (Pin 18). Data clocked into CFGDAT is transferred to a control register each time a group of 8 bits is
received. Pulses on CFGCLK are used to clock configuration data into and out of the radio through CFGDAT.
17
CFGDAT
In/Out
When writing through CFGDAT, a data bit is clocked into the radio on the rising edge of a CFGCLK pulse.
When reading through CFGDAT, data is output on the rising edge of the CFGCLK pulse and is stable for read-
ing on the falling edge of the CFGCLK. Refer to the TR8001 datasheet for detailed timing. This pin is a high
impedance input (CMOS compatible) in 2G mode. This pin must be held at a logic level. Do not allow this pin
to float.
In 3G control mode, pulses on CFGCLK are used to clock configuration data into and out of the radio through
CFGDAT (Pin 17). When writing to CFGDAT, a data bit is clocked into the radio on the rising edge of a CFG-
18
CFGCLK
In/Out
CLK pulse. When reading through CFGDAT, data is stable for reading on the falling edge of the CFGCLK.
Refer to the TR8001 datasheet for detailed timing. This pin is a high impedance input (CMOS compatible) in
2G mode. Do not allow this pin to float.
RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-8148
RFM Europe Phone: 44 1963 251383 Fax: 44 1963 251510
?1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
E-mail: info@rfm.com
http://www.rfm.com
DR8001-071107
Page 4 of 8
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