Motorola IH5, MCPN750A ABORT ABT/RESET RST Switch S1, 3. MX Signal Timings Signal Descriptions

Models: IH5 MCPN750A

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Figure 6-3. MX Signal Timings

Block Diagram

 

Time Slot 15

Time Slot 0

Time Slot 1

Time Slot 2

Time Slot 3

MXCLK

 

 

 

 

 

MXSYNC#

 

 

 

 

 

MXDO

Reserved

RTS3

DTR3

RTS1

RTS2

MXDI

DCD2

CTS3

DSR3

DCD3

CTS1

Figure 6-3. MX Signal Timings

Signal Descriptions

Serial Ports Defined:

CTSn - clear to send

DCDn - data carrier detected

DSRn - data set ready

DTRn - data terminal ready

RIn - ring indicator

RTSn - request to send

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ABORT (ABT)/RESET (RST) Switch (S1)

The MCPN750A SBC contains a single push button switch that provides both ABORT and RESET functions. When the switch is depressed for less than 3 seconds, an interrupt is generated to the processor via ISA interrupts IRQ8. If the switch is held for more than 3 seconds, a board hard reset is generated.

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Page 123
Image 123
Motorola IH5, MCPN750A manual ABORT ABT/RESET RST Switch S1, 3. MX Signal Timings Signal Descriptions, Serial Ports Defined