STM7E1 데이터 시트보기 (PDF) - STMicroelectronics
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STM7E1 Datasheet PDF : 16 Pages
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STM7E1
Application circuit
1.1
Test mode description (mode = 0, test = 1)
In order to test the main switches (4-point measurement), test modes are foreseen where
the main switches can be controlled independently from each other. One can enter in test
mode by controlling the Sc, Lm and Ls pins according to the following table.
The digital part and auxiliary switches can be tested in functional mode
Table 5.
Test mode
Signification
A_TX closed
A_RX closed
B_TX closed
B_RX closed
B_TX & c closed
A_RX & d closed
All main switches open
Sc
Lm
Ls
H
H
L
L
H
L
H
L
H
L
L
H
H
L
L
L
L
L
H
H
H
L
H
H
Note:
Although there is an internal pull down in the TEST pin, an external hardware connection
from TEST to GND is required on the board to work in functional, mode.
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