M52957AFP Просмотр технического описания (PDF) - Renesas Electronics
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M52957AFP Datasheet PDF : 14 Pages
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M52957AFP
Mask Option
(1) The second integration current value can be doubled.( 2.5µ
(2) Control terminal variation
5.0µA)
1 Full spec (typical)
C
R
L
E
HS
A
L
V
S
T
B
S
E
T
I
N
T
O
L
D
O
U
T
11
5
7 9 10 8
This type uses
CLALV,STB,RESET,INT,HOLD,SOUT terminal as
I/F terminal to the microcomputer.
This is the typical type at M52957AFP.
MICROCOMPUTER
2 Most simplified type
H
S
I
O
O
NL
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.
(I) Clamp level fixation
Selects 1 point from 16 steps of clamp level and fixes it.
(II) 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.
0.125nA
0.25nA
0.5nA
1.0nA
Fixes 3 parts of 4 switches correspond to each bit in figure to
ON or OFF,controls another part by CLALV terminal .
(b)STB
(c)RESET
When no standby function required such as VCC is suitched ON/OFF,
STB terminal can be eliminated.
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 to STB terminal ON/OFF at consecutive distance detection.
Rev.1.0, Sep.19.2003, page 12 of 13
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