Nokia 9000i Service Manual page 48

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