UPD78F0078GK-9ET-A Renesas Electronics America, UPD78F0078GK-9ET-A Datasheet - Page 450

• Manufacturer Part Number: UPD78F0078GK-9ET-A
• Manufacturer: Renesas Electronics America

Specifications of UPD78F0078GK-9ET-A

• Lead Free Status / Rohs Status: Supplier Unconfirmed

<RESET pin>
<Port pins>
<Oscillator>
<Power supply>
448
If the reset signal of the dedicated flash programmer is connected to the RESET pin connected to the reset signal
generator on-board, a signal conflict occurs. To prevent this, isolate the connection with the reset signal generator.
If the reset signal is input from the user system in the flash memory programming mode, a normal programming
operation cannot be performed. Therefore, do not input reset signals from other than the dedicated flash
programmer.
When the PD78F0078 and 78F0078Y enter the flash memory programming mode, all the pins other than those
that communicate with the flash programmer are in the same status as immediately after reset.
If the external device does not recognize initial statuses such as the output high impedance status, therefore,
connect the external device to V
When using the on-board clock, connect X1, X2, XT1, and XT2 as required in the normal operation mode.
When using the clock output of the flash programmer, connect it directly to X1, disconnecting the main oscillator
on-board, and leave the X2 pin open. The subsystem clock conforms to the normal operation mode.
To use the power output from the flash programmer, connect the V
programmer, and the V
To use the on-board power supply, make connections that accord with the normal operation mode.
However, because the voltage is monitored by the flash programmer, be sure to connect the V
and V
Supply the same power as in the normal operation mode to the other power supply pins (AV
SS1
pins to V
PD78F0078, 78F0078Y
RESET
DD
and GND of the flash programmer.
SS0
The signal output by the reset signal generator and the signal output from
the dedicated flash programmer conflict in the flash memory programming
mode, so isolate the signal of the reset signal generator.
and V
Figure 23-9. Signal Conflict (RESET Pin)
DD0
SS1
CHAPTER 23
Signal conflict
or V
pins to GND of the flash programmer.
User’s Manual U14260EJ4V0UD
SS0
via a resistor.
PD78F0078, 78F0078Y
Reset signal generator
Connection pin of dedicated
flash programmer
Output pin
DD0
and V
DD1
pins to V
REF
DD
DD0
and AV
, V
of the flash
DD1
, V
SS
SS0
).
,