參數(shù)資料
型號(hào)： AD664
廠商： Analog Devices, Inc.
英文描述： Monolithic 12-Bit Quad DAC
中文描述： 單片12位四路DAC
文件頁(yè)數(shù)： 14/20頁(yè)
文件大小： 566K
代理商： AD664
AD664
REV. C
–14–
The schemes in Figure 25 illustrate some of the trade-offs which
a designer may make when configuring a system. For example,
the designer may use I/O lines instead of address bits or vice
versa. This decision may be influenced by other I/O tasks or sys-
tem expansion requirements. He/she can also choose to imple-
ment only a subset of the features available. Perhaps the
RST
pin isn’t really needed. Tying that input pin to V
LOGIC
frees up
another I/O or address bit. The same consideration applies to
mode select. In all of these cases
TR
is shown tied to V
LOGIC
,
because the MC6801 cannot provide the 12-bit-wide input
word required for the transparent mode. In situations where
transparent operation isn’t required, and mode select is also not
needed, the designer may consider specifying the DIP version of
the device (either the UNI or BIP version).
Each of the schemes illustrated in Figure 25 operates with an
MC6801 at clock rates up to and including 1.5 MHz. Similar
schemes can be derived for other 8-bit microprocessors and
microcontrollers such as the 8051/8086/8088/6502, etc. One
such scheme developed for the 8051/AD664 is illustrated in
Figure 26.
8051 Interface
Figure 26 shows the AD664 combined with an 8051
μ
controller
chip. Three LSBs of address provide the quad and DAC select
signals. Control signals from Port 1 select various operating
modes such as readback, mode select and reset as well as pro-
viding the
LS
signal. Read and write signals from the 8051 are
decoded to provide the
CS
signal.
Figure 25d. Interfacing Eight AD664s to an MC6801
相關(guān)PDF資料
PDF描述
AD664AD-BIP Monolithic 12-Bit Quad DAC
AD664AD-UNI Monolithic 12-Bit Quad DAC
AD664KN-BIP Monolithic 12-Bit Quad DAC
AD664KN-UNI Monolithic 12-Bit Quad DAC
AD664SD-BIP Monolithic 12-Bit Quad DAC
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