User’s Manual U13045EJ2V0UM00
43
CHAPTER 3 PIN FUNCTIONS
3.2.13 V
PP
(
µ
PD78F9116, 78F9136 only)
A high voltage should be applied to this pin when the flash memory programming mode is set and when the program
is written or verified.
Directly connect this pin to V
SS
in the normal operation mode.
3.2.14 IC0 (pin No.20) (mask ROM version only)
The IC0 (Internally Connected) pin (No. 20) (refer to 1.4 Pin Configuration (Top View), 2.4 Pin Configuration
(Top View)) is used to set the
µ
PD789134 in the test mode before shipment. In the normal operation mode, connect
this pin directly to the V
SS
pin with as short a wiring length as possible.
If a potential difference is generated between the IC0 pin and V
SS
pin due to a long wiring length between the IC0
pin and V
SS
pin or external noise superimposed on the IC0 pin, the user program may not run correctly.
Connect the IC0 pin directly to the V
SS
pin.
3.2.15 IC0 (pins No.10 and No.21)
The IC0 pins (No.10 and No.21) (refer to 1.4 Pin Configuration (Top View), 2.4 Pin Configuration (Top View)
are internally connected.
Connect the IC0 pins directly to V
SS
.
V
SS
IC0 (pin No.20)
Keep short
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