Honeywell MK VI - Manual (Page 173)

Honeywell
MK VI MK VIII EGPWS Installation Design Guide
Proprietary notice on title page applies
CAGE CODE: 97896 SCALE: NONE SIZE: A DWG NO: 060-4314-150 REV: SHEET 173
4.3.1 RS-232 Maintenance Port (serial port 4)
One port is provided which meets the characteristics specified in RS232C. This bus can be used to read internal data from
the MK VI or MK VIII EGPWS for both bench, and aircraft testing or transmitting configuration data for selected
EGPWS interfaces and options.
Baud Rate 19,200
Parity None
Data bits 8
Stop bits 1
Maximum Recommended Cable Length 15 meters
Pin Assignment (Signal Mnemonic):
Transmit
Receive
Common J3-4
J3-3
J3-1 (RS232TXD_MON)
(RS232RXD_MON)
(GND)
4.3.2 PCMCIA / SmartCable Port
One port is provided which meets the Motorola SPI characteristics. The PCMCIA / SmartCable interface allows for both
the uploading, and downloading of internal MK VI and MK VIII EGPWS information. Using this interface system,
software and databases can be updated. Control of the upload/download process is accomplished by connection of the
SmartCable to the MK VI or MK VIII EGPWS front panel test connector and insertion of the PCMCIA card. LEDs are
provided on the SmartCable for PCMCIA interface operation. The PCMCIA / SmartCable is not intended as an on-line/in-
flight storage medium and must be removed after completion of the upload/download operation.
Electrical Characteristics Refer to the Motorola SPI specification
Data definition Refer to the Motorola SPI specification
Maximum Recommended Cable Length 2 meters
Pin Assignment (Signal Mnemonic):
Clock
Master Data Out
Master Data In
SmartCable Select
SmartCable +5VDC
SmartCable +5VDC Return
PCMCIA Card Present
SmartCable Ground J3-7
J3-9
J3-8
J3-10
J3-6
J3-1
J3-2
J3-12, -13, -14 (SPICLK)
(SPIMOSI)
(SPIMISO)
(SPISEL_SC#)
(SC_PWR)
(GND)
(CARD_PRES#)
(GND)
NOTE: SmartCable +5VDC Return is common with RS-232 Maintenance Port common.
4.3.3 GSE Present Discrete Input
A discrete input for test and Ground Support Equipment is provided. Grounding this pin indicates to the EGPWS that test
or Ground Support Equipment is connected to the computer.
Active Threshold Voltage (Logic True) < 0.8 VDC
Inactive Threshold Voltage (Logic False) > 2.0 VDC
Input Impedance > 20 K Ω
Maximum Fault Current < 500 µ A
Pin Assignment (Signal Mnemonic): J3-11 (GSE_PRES#)
4.4 Front Panel Status Indicators
The MK VI and MK VIII EGPWC front panel provides three LEDs for indicating system and LRU status. A yellow LED
labeled “EXTERNAL FAULT” is activated when a signal fault external to the MK VI or MK VIII EGPWC is detected.
A green LED labeled “COMPUTER OK” is activated when the MK VI or MK VIII EGPWC itself is okay. A red LED
labeled “COMPUTER FAIL” is activated when the MK VI or MK VIII EGPWC has detected an internal computer fault.
Refer to Product Specification 965-1180-601 for a detailed discussion of status indications, recommended maintenance
actions, Self Test activation and response.