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参数资料
| 型号： | ADC0802LD |
| 厂商： | HARRIS SEMICONDUCTOR |
| 元件分类： | ADC |
| 英文描述： | 8-Bit, Microprocessor- Compatible, A/D Converters |
| 中文描述： | 1-CH 8-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, CDIP20 |
| 文件页数： | 28/41页 |
| 文件大小： | 1118K |
| 代理商： | ADC0802LD |
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Functional Description
(Continued)
4.2 Interfacing the Z-80
The Z-80 control bus is slightly different from that of the
8080. General RD and WR strobes are provided and sepa-
rate memory request, MREQ, and I/O request, IORQ, sig-
nals are used which have to be combined with the general-
ized strobes to provide the equivalent 8080 signals. An
advantage of operating the A/D in I/O space with the Z-80 is
that the CPU will automatically insert one wait state (the RD
and WR strobes are extended one clock period) to allow
more time for the I/O devices to respond. Logic to map the
A/D in I/O space is shown in Figure 14
Additional I/O advantages exist as software DMA routines
are available and use can be made of the output data trans-
fer which exists on the upper 8 address lines (A8 toA15) dur-
DS005671-21
FIGURE 13. INS8048 Interface
SAMPLE PROGRAM FOR
Figure 13
INS8048 INTERFACE
DS005671-A0
DS005671-23
FIGURE 14. Mapping the A/D as an I/O Device
for Use with the Z-80 CPU
A
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| ADC0802LJ | 制造商:NSC 制造商全称:National Semiconductor 功能描述:8-Bit uP Compatible A/D Converters |
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