UPD78F0034BGC-8BS-A Renesas Electronics America, UPD78F0034BGC-8BS-A Datasheet - Page 459

• Manufacturer Part Number: UPD78F0034BGC-8BS-A
• Description: MCU 8-Bit 78K0 CISC 32KB Flash 2.5V/3.3V/5V 64-Pin LQFP
• Manufacturer: Renesas Electronics America

Specifications of UPD78F0034BGC-8BS-A

• Package: 64LQFP
• Family Name: 78K0
• Maximum Speed: 12 MHz
• Ram Size: 1 KB
• Program Memory Size: 32 KB
• Operating Supply Voltage: 2.5|3.3|5 V
• Data Bus Width: 8 Bit
• Program Memory Type: Flash
• Number Of Programmable I/os: 51
• Interface Type: 3-Wire/UART
• On-chip Adc: 8-chx10-bit
• Operating Temperature: -40 to 85 °C
• Number Of Timers: 3

<RESET pin>
<Port pins>
<Oscillator>
<Power supply>
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 PD78F0034A, 78F0034B, 78F0034AY, and 78F0034BY enter the flash memory programming mode,
all the pins other than those that communicate in flash memory programming 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
pins to V
Supply the same power as in the normal operation mode to the other power supply pins (AV
DD
and GND of the flash programmer.
Flash memory version
RESET
CHAPTER 23
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 23-8. Signal Conflict (RESET Pin)
DD0
SS1
Signal conflict
PD78F0034A, 78F0034B, 78F0034AY, 78F0034BY
or V
pins to GND of the flash programmer.
User’s Manual U14046EJ5V0UD
SS0
via a resistor.
Reset signal generator
Connection pin of dedicated
flash programmer
Output pin
DD0
and V
DD1
pins to V
DD0
, V
DD
DD1
, AV
, V
DD
REF
SS0
of the flash
, and AV
, and V
457
SS
SS1
).