User Guide

PAMS
System Module DB6
NHB–3
Technical Documentation
Original 26/97
Page 4–7
Pin/Con Symbol Notes
6/sys HOOK_RXD2 • Flash loading data
• min/typ/max 0 /0.2 /0.7 V Input low level
• min/typ/max 3.6 /4.65 /4.8 V Input high level
7/sys PHFS TXD2 • Power control for PHF–1
• min/typ/max 0 /0.2 /0.7 V Output low,
power off
• min/typ/max 3.6 /4.65 /4.8 V Output high,
power on
• Flash loading acknowledgedata
• min/typ/max 0 /0.2 /0.7 V Output low level
• min/typ/max 3.6 /4.65/4.8 V Output high level
15/sys DCLK • DBUS clock 512 kHz
• min/typ/max 3.6 /4.65 /4.8 V State ”1”
• min/typ/max 0 /0.2 /0.7 V State ”0”
11/sys DSYNC • DBUS sync 8 kHz
• min/typ/max 3.6 /4.65 /4.8 V State ”1”
• min/typ/max 0 /0.2 /0.7 V State ”0”
4/sys TDA • DBUS transmitted data from HP
• min/typ/max 3.6/4.65/4.8 V State ”1”,
1mA load
• min/typ/max 0 /0.2 /0.7 V State ”0”
12/sys RDA • DBUS received data to HP
min/typ/max 3.6/4.65/4.8 V State ”1”
• min/typ/max 0 /0.2 /0.7 V State ”0”
13/sys BENA • typ 0 V Headset power off
• min/typ 4.4 /4.6 V Headset power on
4/UIF BACKLIGHT • Display and keyboard illumination control
• min/max 0 /0.7 V Output low, backlights off
• min/typ/max 4.5 /4.65 / 4.8 V Output high,
backlights on
5–8/UIF UIF(0:3) • Keyboard row lines read. Display data
lines write.
• min/max 0 /0.7 V Output/Input low
• min/max 4.5 /4.8 V Output/Input high
9/UIF UIF4 • Keyboard row read. Write strobe for
LCD driver
• min/max 0 /0.7 V Output/Input low
• min/max 4.5 /4.8 V Output/Input high