M52957 Просмотр технического описания (PDF) - MITSUBISHI ELECTRIC
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M52957 Datasheet PDF : 9 Pages
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MITSUBISHI ICs (AV COMMON)
M52957FP
DISTANCE DETECTION SIGNAL PROCESSING FOR 3V SUPPLY VOLTAGE
MASK OPTION
(1) The second integration current value can be doubled.
(2.5µ 5.0µA)
(2) Control terminal variation
1 Full spec (typical)
0.125nA
0.25nA
0.5nA
1.0nA
C
R
L
E
H
S
A
S
S
I
O
O
L
T
E
N
L
U
V
B
T
T
D
T
11
5
7
9
10
8
MICROCOMPUTER
This type uses CLALV, STB, RESET, INT, HOLD, SOUT terminal as
I/F terminal to the microcomputer.
This is the typical type at M52957FP.
2 Most simplified type
Fixes 3 parts of 4 switches correspond to each bit in figure to ON or
OFF,controls another part by CLALV terminal .
(b) STB
When no standby function required such as VCC is switched ON/
OFF,STB terminal can be eliminated.
(c) RESET
Since IC include power on reset circuit,RESET terminal can be
eliminated. As merit of controlling RESET terminal from
outside,distance detection time can be shortened because
there is no need to switch VCC or STB Terminal ON /OFF at
consecutive distance detection.
H
S
I
O
O
N
L
U
T
D
T
9
10
8
MICROCOMPUTER
This type does not connect CLALV, STB, RESET terminals to the
microcomputer.
When above mentioned terminals are not connected to the
microcomputer without changing mask,connect each terminal to
the ground. In this case,clamp level becomes 0 and standby
function is lost. Power on reset in IC is used as reset.
3 Explanation of the terminal that can be simplified.
(a) CLALV
In the typical type,16way clamp levels can be set by the external
control,but also the terminal can be simplified by mask option
as follows.
1. Clamp level fixation
Selects 1 point from 16 steps of clamp level and fixes it.
2. Clamp level 2 step changeover
Selects 2 points from clamp level and switches it by changing
CLALV terminal HIGH/LOW. However,as selecting 2 points,
there is a following constraint.
8
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