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Connect Tech Blue Heat/Net Sync User Manual
Revision 0.01 65 65
DB-9 Female Pinouts
DB9F
Pin
Signal Name [1]
Functional
Notes
1
RTC_Clear
Clears and holds the seconds count of the Real Time Clock at
00.
[3], [6]
2
RTC_Seconds
Provides the external time base for the Real Time Clock.
Internal time base is 1Hz
[3], [5]
3
GND
Signal reference for all signals
4
EXT_REF_CLK
0-20MHz clock input
[2]
5
GND
Signal reference for all signals
6
TX_TRIGGER_P1
Transmission trigger for port 1
[3], [4], [5]
7
TX_TRIGGER_P2
Transmission trigger for port 2
[3], [4], [5]
8
TX_TRIGGER_P3
Transmission trigger for port 3
[3], [4], [5]
9
TX_TRIGGER_P4
Transmission trigger for port 4
[3], [4], [5]
[1] All signals are inputs.
[2] Electrical properties for External Reference clock input:
+/- (1-10)Vpp AC sine wave
+/- (3.3-10Vpp square wave.
10-20MHz Frequency range.
Capacitive coupled input.
Must be referenced to GND pin.
TTL compatible. For example 0-3.3V or 0-5V will work.
[3] Electrical properties:
+/- (3.3- 10)Vpp pulse.
Minimum pulse width is 100ns seconds.
Capacitive coupled input.
Must be referenced to GND pin.
TTL compatible. For example 0-3.3V or 0-5V will work.
[4] Used for Asynchronous transmissions. When the mode is enabled, the Blue Heat/Net Sync will
transmit exactly one byte of data when the TX_TRIGGER input changes state. These same
signals are available on the individual DB25 port connectors.
[5] The input is edge sensitive and can be configured for negative or positive edge sensitivity.
[6] The input is level sensitive and can be configured for 1 or 0 level sensitivity.
Table 10: DB-9 Female Pinouts