User Guide

Technical Documentation
NHD–4
System Module
P.A.M.S
Page 4–6
Original 11/97
Table 1. Power Block Connections (continued)
NotesTypeSignal Name
VLCD OUT Voltage for LCD on UIF
VBATDET OUT Switched VBATT
VC OUT Attenuated VCHRGMON
CHRG_INT OUT Signal to indicate a Charger has been connected
to Phone.
MCU Block
Table 2. MCU Block Connections
Signal Name Type Notes
MCU_CLK IN Clk into MCU
XSYS_RESET IN MCU Reset
MCUAD(19:0) OUT MCU Address Bus
MCUDA(7:0) I/O MCU Data Bus
XMCU_AS OUT MCU Address Strobe
XMCU_RD OUT MCU Read
XMCU_WR OUT MCU Write
MCU_NMI IN MCU Non Maskable Interupt
MCU_INT0 IN MCU Maskable Interupt 1
CODEC_DI OUT Audio codec control data
CODEC_CLK OUT Codec Clock
XCODEC_CS OUT Audio codec chip select
CODEC_DO IN Audio codec control data
CALL_LED OUT UIF CALL_LED enable
BACK_LIGHT OUT UIF BACK_LIGHT enable
PHFS_TXD2 OUT Hands Free speaker Mute Control
HOOK_RXD2 OUT Hook Recieved data
VIB_CONT OUT Vibrator Control
MBUS_OUT OUT MBUS data output
VAHS_EN OUT Headset voltage enable
VOLTLIM OUT Voltage Limiting
5VOFF OUT voltage reg control
VCHRGPWM OUT Control PWM
XPWROFF OUT Watchdog signal
TEMP1_EN OUT RFTEMP1
TEMP2_EN OUT RFTEMP2
VBATDET IN A/D input for battery voltage level