Rainbow Electronics RF12 - Manual (Page 7)

RF12
8 CLK DO Microcontroller clock output
XTL AIO
Crystal connection (the other terminal of crystal to VSS) or external reference
input 9
REF AIO External reference input. Use 33 pF series coupling capacitor
10 nRES DIO Open drain reset output with internal pull-up and input buffer (active low)
11 VSS_D S Digital VSS(Connect to VSS)
12 VSS_A S Analog VSS(Connect to VSS)
13 VSS_RF S RF VSS(Connect to VSS)
14 RF2 AIO RF differential signal input/output
15 RF1 AIO RF differential signal input/output
16 VDD_RF S RF VDD(Connect to VDD)
17 VDD_A S Analog VDD(Connect to VDD)
18 VDD_D S Digital VDD(Connect to VDD)
19 ARSSI AO Analog RSSI output
nINT DI Interrupt input (active low)
20
VDI DO Valid data indicator output
Note: The actual mode of the multipurpose pins (pin 6 and 7) is determined by the TX/RX data I/O
settings of the transceiver.
Typical Application
Typical application with FIFO usage
Tel: +86-755-86096587 Fax: +86-755-86096602 E-mail: [email protected] http://www.hoperf.com