Programme’s After Market Services NHD–4 Series Transceivers Chapter 6 Uif Module Original 11/97
PAMS NHD–4 Uif Module Technical Documentation CONTENTS Page No External Signals and Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Circuit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Main components on the DU8 module . . . . . . . . . . . . . . . . . . . . . . . .
NHD–4 PAMS Technical Documentation Uif Module External Signals and Connections Table 1. To Radio Module Signal Name Pin / Conn. Notes VL1 1 Logic supply voltage 3.
PAMS NHD–4 Uif Module Technical Documentation Table 2. To LCD Module Pin Signal Name Notes 1 GND Ground 2,3 OSC1, OSC2 Oscillation terminals 4–8 V1–V5 LCD driving power source 9 V5OUT Negative voltage converter output 10–11 C1, C2 4.
NHD–4 PAMS Technical Documentation Uif Module Keyboard scanning and display driver control COL(0–4) are used as column lines in keyboard. UIF(0–5) are used as row lines. They are also multiplexed with display driver control signals. When a key is pressed the ASIC gets an interrupt from a row and the MCU starts scanning. One column at a time is written to low and rows are used to read which key it was.
NHD–4 Uif Module PAMS Technical Documentation The display module contains an oscillator to generate a negative voltage required for operation. The oscillator frequency is fixed on the UIF module by the resistance from pins 2 to 3 of X1, with the values of R6 and R16 shown, the frequency is within 180 kHz to 370 kHz. The negative going pulses appear at pin 9 of X1 where they are smoothed by C1 to give a voltage which is nominally equal but opposite to VL1.
NHD–4 PAMS Technical Documentation Uif Module Power Distribution Diagram VA2 VL1 VL5VOLT VBATT Call LED KEY/LC D Lights Buzzer LCD Keyboard scan Audio GND AGND Figure 2.
PAMS NHD–4 Uif Module Technical Documentation Parts List – DU8D_05 p.n 0200521 EDMS issue 8.
NHD–4 PAMS Technical Documentation R052 R053 R054 C001 C002 C004 C005 C006 C007 C008 C009 C010 C013 C014 C015 C021 C023 C026 C027 C030 C031 C040 B001 B002 B003 V002 V003 V004 V005 V008 V010 V011 V012 V013 V014 V015 V016 V017 V018 V019 V020 V021 V022 Original 11/97 1430053 1430013 1430087 2604248 2604431 2604248 2307816 2307816 2307816 2307816 2307816 2307816 2604209 2320041 2320041 2320041 2307816 2307816 2307816 2320041 2320041 2320107 5140014 5140446 5140576 4200829 4200811 4200836 4200811 4200811 4864
PAMS NHD–4 Uif Module V023 V024 V025 V026 V027 V028 V029 V030 V031 V032 V033 V034 V036 V037 V040 V041 V042 V043 V044 Page 6–10 Technical Documentation 4864388 4864388 4864388 4864388 4864388 4864388 4864388 4864388 4864388 4864388 4864388 4864388 4111824 4111824 4200811 4200836 4200836 4200836 4200836 4850038 9460074 9460075 9480061 9480078 9480103 9480134 9795021 9795022 9855017 Led Green 0603 Led Green 0603 Led Green 0603 Led Green 0603 Led Green 0603 Led Green 0603 Led Green 0603 Led Green 0603 Led
