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Maintenance
4–2
TMS 109A Socket 7 Microprocessor Support
A PLL clock generator is used to provide eight, zero-delay copies of the Socket 7
microprocessor CLK input that are distributed to the PALs. Lock time after VCC
is a 500
m
S maximum, the clock is stable before any Socket 7 microprocessor bus
cycles start. Table 4–1 lists Socket 7
signal delays when using the probe adapter.
Table 4–1: Socket 7 signal delays using the probe adapter
Signal name
Hardware CLK delays
Firmware CLK delays
A31:3, D63:0, BE7-0#,
D/C#, M/IO#, PRDY,
LOCK#, BUSCHK#,
SMIACT#, INIT, SCYC,
D/P#, AHOLD
0
2
HLDA, ADS#, BRDY#
2
0
BOFF#
2
1
RESET, NA#
1
0
W/R#
2
1
Replacing the Fuse
If the fuse on the Socket 7 probe adapter opens (burns out), you can replace it
with a 5 A, 125 V fuse. Figure 4–1 shows the location of the fuse on the probe
adapter board.
Fuse
Figure 4–1: Location of the fuse on the probe adapter
Summary of Contents for Socket 7 TMS109A
Page 12: ...Service Safety Summary viii TMS 109A Socket 7 Microprocessor Support...
Page 15: ...Getting Started...
Page 16: ......
Page 45: ...Operating Basics...
Page 46: ......
Page 54: ...Setting Up the Support 2 8 TMS 109A Socket 7 Microprocessor Support...
Page 75: ...Specifications...
Page 76: ......
Page 82: ......
Page 83: ...Maintenance...
Page 84: ......
Page 87: ...Diagrams...
Page 88: ......
Page 90: ...5 2 TMS 109A Socket 7 Hardware Support...
Page 91: ...5 3 TMS 109A Socket 7 Microprocessor Support...
Page 94: ...TMS 109A Socket 7 Microprocessor Support 5 6...
Page 96: ...TMS 109A Socket 7 Microprocessor Support 5 8...
Page 98: ...TMS 109A Socket 7 Microprocessor Support 5 10...
Page 100: ...TMS 109A Socket 7 Microprocessor Support 5 12...
Page 101: ...Replaceable Parts...
Page 102: ......
Page 108: ...Replaceable Parts 6 6 TMS 109A Socket 7 Microprocessor Support...
Page 109: ...Index...
Page 110: ......