M66007FP 查看數據表（PDF） - MITSUBISHI ELECTRIC
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M66007FP Datasheet PDF : 6 Pages
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MITSUBISHI 〈DIGITAL ASSP〉
M66007P/FP
12-BIT INPUT EXPANDER
DESCRIPTION OF OPERATION
(1) When power is turned on, LE/D is placed in input/output
indeterminate mode. However, detection of 13 or more of
falling edges of CLK sets LE/D in input mode.
(2) When LE/D is placed in input mode, and CLK is set to “H”,
access starts at a falling edge of LE/D and the status of D0
to D11 is latched.
(3) In addition, LE/D switches from input mode to output mode
and then outputs “L”.
(4) At a falling edge of CLK from “H” to “L”, data latched in step
(2) is shifted sequentially and is then output from LE/D in
order of D0 to D11.
(5) After the output of 12-bit data of D0 to D11, LE/D is
switched to input mode at the 13th falling edge of CLK to
wait for next access. Keep the LE/D pin set to “H” until the
next access starts.
OPERATION TIMING CHART
CLK
Power ON
Rest sequence (13 clocks or more)
(IN)
LE/D
(OUT)
(1)
Input/output indeterminate
1 2 3 4 5 6 7 8 9 10 11 12 13
(5)
(2)
(4)
D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10
D11
(3)
D0
D0
D11
LE/D
input/output mode
Indeterminate
D11
Input mode
(Latch signal)
Output mode (Output signal)
Input mode
2
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