After Sales
Technical Documentation
RAE/RAK–1N
Baseband
Page 2–22
Original, 08/96
Table 23. External Signals and Connections, Inputs (continued)
FromSignal descriptionSignal Name
BTYPE Battery size identification Battery
Conn
JCONN Junction box connection identification AUDIO
MBUSIN MBUS RX data B2B Conn
Table 24. External Signals and Connections, Outputs
Signal Name Signal description To
XPWROFF Power off control, PSL+ watchdog reset PWRU
PWM Charger switch on/off control PWRU
WSTROBEX MCU write strobe ASIC
RSTROBEX MCU read strobe ASIC
MCUAD(19:16)
MCUAD(4:0)
Parts of MCU address bus ASIC
MRBUSDET MBUS and RBUS activity detection ASIC
PCMCLK Clock for audio codec control data transfer AUDIO
PCMCDI Audio codec control data transmitting AUDIO
XSELPCMC Chip select for audio codec AUDIO
RBUSTXD RBUS transmit B2B Conn
BACKLIGHT LCD and display backlight on/off control B2B Conn
AMP_PWR PHF amplifier ON/STDBY AUDIO
VOLTLIM Charging voltage limitation during call PWRU
MBUSOUT MBUS TX data (open drain) B2B Conn
Table 25. External Signals and Connections, Bidirectional
Signal Name Signal description To/From
MCUDA(15:8) MCU’s 8–bit data bus ASIC
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