CTI Products CCU Channel Control Unit - Manual (Page 11)

CCU Hardware Reference Theory of Operation
CTI Products, Inc.
68-11843-105
5
3.2 Section 1 - Main / Standby Base Selection
The following logic diagram of the Main / Standby Base Select section shows the
basic section logic.
Debounce One-Shot
Debounce One-Shot
CK +
T
S (Async)
R (Async)
System Reset
Q
Q
CtlI Bit 1 Main/Stby Toggle 1
Ctl Bit 2 Main Base Force On
Ctl Bit 3 Main/Stby Toggle 2
Ctl Bit 4 Stby Base Force On
Stat Bit 1 Main/Stby Base Toggle 1
Stat Bit 3 Main/Stby Base Toggle 2
Stat Bit 2 Main Base Select
Stat Bit 4 Stby Base Select
/Main Base Select
/Stby Base Select
/Main Base Select 2
/Standby Base Select 2
2
1
4
21
Stat Bit 21 Main/Stby Tgl 3
Debounce One-Shot
(CIB Rx 1)
(CIB Vote 1)
(CIB Dis 7)
Main/Stby Base Toggle 1
22
21
2
Main/Stby Base Toggle 2
Main/Stby Base Toggle 3
20
19
23
31
(CIB Mon 6)
(CIB Fail 1)
(CIB Dis 1)
(CIB Mon 1)
CA-80877-105 CCU Version 105 Logic Section 1
Figure 3 – Main / Standby Base Section Logic
There are three external inputs:
•
/Main/Standby Toggle 1 (from Console 1)
•
/Main/Standby Toggle 2 (from Console 2)
•
/Main/Standby Toggle 3 (from Console 3)
There are four logic outputs:
•
/Main Base Select 1 (Normal) to TSAM TXS1
•
/Main Base Select 2 (Normal)
•
/Standby Base Select 1 (Inverted) To TSAM TXS2
•
/Standby Base Select 2 (Inverted) To Console Input