User's Manual

Table Of Contents
SYSTEM DESCRIPTION AND INSTALLATION MANUAL
T
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CAS/Part No.9005000
Table 4-2: T
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CAS Computer Unit Interface Description
(Applicable to Part No. 9005000-11801 and -55801)
Connector
Pin
Designation
Functional Description
RTP-15F
APM Clock
This is the APM Clock Output which is used to synchronize serial output to the
APM. The Clock output frequency is 2.0 MHz + 1% when the APM is being
accessed and is set to a logic 0 (not toggling) when the APM is not being accessed.
Connect to APM J1-2.
RTP-15G
APM Serial Data Output
This is the Serial Data Output from T
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CAS to the APM Serial Data Input. APM
Enable (RTP-15J) and APM Write Enable (RTP-15K) must be enabled before data
can be written to the APM. Connect to APM J1-1.
RTP-15H
APM Serial Data Input
This is the Serial Data Input to T
3
CAS from the APM Serial Data Output. APM
Enable (RTP-15J) must be enabled before data can be read from the APM. Connect
to APM J1-9.
RTP-15J
APM Enable No.1
This pin is used to Enable Read/Write access to the APM. An APM Enable Output
logic of 1 disables Read/Write access to the APM and a logic 0 enables APM
Read/Write access. Connect to APM J1-3. This pin is used in conjunction with pins
RTP-15G (APM serial output) and RTP-15H (APM serial input).
RTP-15K
APM Write Enable No.1
This pin is used to Enable Write access to the APM. An APM Write Enable Output
logic of 1 disables Write access to the APM and a logic 0 enables APM Write
access. Connect to APM J1-4. This pin is used in conjunction with pin RTP-15G
(APM serial output).
T
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CAS Computer Unit Right Middle Plug (RMP)
RMP-1A
PIL_O_AURAL_EXTERNAL_REQ_1
RMP-1B,
RMP-1C
Discrete Outputs (Standard Ground/Open): Spares
RMP-1D DO_ADSB_FAIL_INDICATOR
RMP-1E
TA Display Enable Discrete Output (NO)
This output is a ground/open-type discrete used by the weather radar display to
place the radar in standby mode. A ground on this pin enables the weather radar
display.
Pub. No. 8600200-001, Revision 004
34-45-29
4-45
04 Nov 2014
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