upd17072 Renesas Electronics Corporation., upd17072 Datasheet - Page 19
upd17072
Manufacturer Part Number
upd17072
Description
4-bit Single-chip Microcontroller With Hardware For Digital Tuning System
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD17072.pdf
(226 pages)
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1.4 Notes on Using CE Pin
to IC test), in addition to the functions listed in 1.1 Pin Function List.
V
pin.
use external components as shown below to suppress noise.
DD
The CE pin has a function to set a test mode in which the internal operations of the PD17073 are tested (dedicated
When a voltage higher than V
If the wiring of the CE pin is too long, the above problem occurs because wiring noise is superimposed on the CE
Therefore, wire the CE pin with as short a wiring length as possible to suppress noise. If noise cannot be avoided,
• Connect a diode with low V
Diode with
low V
is applied to the CE pin even during normal operation, the test mode is set, affecting the normal operation.
F
CE
DD
F
between CE and V
is applied to the CE pin, the test mode is set. This means that if noise exceeding
V
DD
V
DD
DD
• Connect a capacitor between CE and V
CE
PD17072,17073
V
DD
V
DD
DD
19
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