Appendices
181
[ 4 ]
Interface Specifications
IrDA Interface
Synchronization:
Start-stop
Input
signals:
RD
Output
signals:
SD
Transmission speed:
115,200 bps max.
Direct-connect Interface
Synchronization:
Start-stop
Transmission speed:
115,200 bps max.
Signal level:
Conforms to the RS-232C interface
Pin assignment:
As shown below.
Pin No.
Signal
Functions
Signal Input/Output
BHT External device
1
SG (GND)
Ground for signals
−
2 SD
Send
data
→
3 RD
Receive
data
←
Radio Interface
Modulation:
Spread Spectrum (Direct Sequence)
Frequency:
2.4
GHz
band
Transmission
speed: 11/5.5/2/1
Mbps
Channels:
13
(ETSI)