2/Theory of Operation
2-21
the LOAD-RAM-HI- and LOAD-RAM-LO- signals that control the Vector RAM
Address Functional Block. For more information on the available
addresses and the signals they affect, see Table 2-6. Table 2-8
illustrates the U5 register bits used by the Output Control Functional
Block.
U10 also provides the START-ENA signal to the SSLOGIC Functional Block.
There are two conditions by which this signal can be made active. If the
CO-START output of U5 is low, setting bit 0 to a 1 when writing to
$D0X11 sets START-ENA high. If the CO-START output of U5 is set high,
START-ENA is not set high until RECV-ARM- is low.
The RECV-ARM- signal comes from the Main PCA and is generated by U23
(74HCT138). RECV-ARM- goes low when ALLCHIP- is low, D0 is low, D1 is
high, and A1 through A3 are low (i.e., the input section is armed). This
permits the input section to be armed at the same time the output
section receives the START-ENA, so that both input and output sections
can be started simultaneously.
To clear START-ENA, the CO-START line must be set low and a WRITE @
$D0X11 must be performed with bit 0 set to 0.
Table 2-8. U5 Register Bit Description (Write @ $D0X01)
___________________________________________________________________________
BIT SIGNAL 1 0
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7 LOAD-RAM- No Load RAM Load RAM
6 COUNTER-ENA- No Counter Enable Counter Enable
5 HSIN-POL- Falling Edge Rising Edge
4 CO-START Co-Start No Co-Start
3 DRV/LD- Drive Load
2 MUX2*1
1 MUX1*
0 MUX0*
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*MUX2 *MUX1 *MUXO CLOCK
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0 1 1 INT-OSC
1 0 0 PSYN
1 0 1 RAM-STROBE
1 1 0 DR CLK
1 1 1 DECREMENT
(other) Ground
___________________________________________________________________________
RAM Select Functional Block
The high-speed 30 ns 8K x 8 SRAM in the module must be accessed when
loading vector files, when driving vector patterns, and when setting the
Содержание 9100 Series
Страница 6: ... iv ...
Страница 8: ... vi ...
Страница 15: ...2 Theory of Operation 2 3 Figure 2 1 Input Section Functional Block Diagram ...
Страница 16: ...2 Theory of Operation 2 4 Figure 2 2 Output Section Functional Block Diagram ...
Страница 19: ...2 Theory of Operation 2 7 Figure 2 3 Input Section Address Decoding Summary ...
Страница 42: ...2 Theory of Operation 2 30 ...
Страница 50: ...4 List of Replaceable Parts 4 2 ...
Страница 54: ...4 List of Replaceable Parts 4 6 Figure 4 1 9100A 017 Final Assembly ...
Страница 55: ...4 List of Replaceable Parts 4 7 Figure 4 1 9100A 017 Final Assembly cont ...
Страница 57: ...4 List of Replaceable Parts 4 9 Figure 4 2 A1 Main PCA ...
Страница 59: ...4 List of Replaceable Parts 4 11 Figure 4 3 A2 Top PCA ...
Страница 64: ...4 List of Replaceable Parts 4 16 ...
Страница 66: ...5 Schematic Diagrams 5 2 ...
Страница 67: ...5 Schematic Diagrams 5 3 Figure 5 1 A1 Main PCA ...
Страница 68: ...5 Schematic Diagrams 5 4 Figure 5 1 A1 Main PCA cont ...
Страница 69: ...5 Schematic Diagrams 5 5 Figure 5 2 A2 Top PCA ...
Страница 70: ...5 Schematic Diagrams 5 6 Figure 5 2 A2 Top PCA cont ...
Страница 74: ...Index Index 4 ...