Instruction manual

Clear-Com Communication Systems
ICS 92/52 Intercom Panel Instruction Manual
3-4
Figure 3-5: Digital Block Diagram—ICS-92/92T/ICS-52/52T Main PCB
ICS-92/52 DIGITAL BLOCK DIAGRAM
PROGRAM MEMORY
RAM MEMORY
ADDRESS BUS A0-A15
A/D BUS
32K BYTES 16K BYTES
COM MODULE
CONTROL BUS
CLOCK OSC
RESET
MICRO- PROCESSOR
ADDRESS LATCH
A0-A7
A8-A15
ADDRESS DECODER
A8-A15
LATCH PORT 'E' INPUTS
FRONT PANEL
INTERCOM VOLUME PROGRAM VOLUME
LO PASS FILTER
ANNOUNCE TONES OUTPUT TO AUDIO
DUAL DIGITAL POTS
DUAL DIGITAL POTS
MUTE RELAY AUX RELAY
FOOT SWITCH INPUT EXTRA LOGIC INPUT
HEADPHONE SENSE INPUT
RESET CLOCK
DATA OUT
DATA IN
SERIAL BUS TO XP PANELS
8-BIT SHIFT REGISTER
CLOCK
DATA
STROBE
FRONT PANEL TALK/LISTEN KEYS & LEDS
A/D BUS
A/D BUS
A/D BUS