UPD78F0034BGC-8BS-A Renesas Electronics America, UPD78F0034BGC-8BS-A Datasheet - Page 458

• 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

(1) Signal conflict
(2) Abnormal operation of other device
456
If the dedicated flash programmer (output) is connected to a serial interface pin (input) that is connected to
another device (output), a signal conflict occurs. To prevent this, isolate the connection with the other device
or set the other device to the output high impedance status.
If the dedicated flash programmer (output or input) is connected to a serial interface pin (input or output) that
is connected to another device (input), a signal is output to the device, which may cause an abnormal operation.
To prevent this abnormal operation, isolate the connection with the other device or set so that the input signals
to the other device are ignored.
Flash memory version
Flash memory version
Flash memory version
Input pin
CHAPTER 23
Figure 23-6. Signal Conflict (Input Pin of Serial Interface)
Pin
Pin
Figure 23-7. Abnormal Operation of Other Device
In the flash memory programming mode, the signal output by another
device and the signal sent by the dedicated flash programmer conflict,
therefore, isolate the signal of the other device.
If the signal output by the
78F0034BY affects another device in the flash memory programming
mode, isolate the signals of the other device.
If the signal output by the dedicated flash programmer affects another
device in the flash memory programming mode, isolate the signals of the
other device.
Signal conflict
PD78F0034A, 78F0034B, 78F0034AY, 78F0034BY
User’s Manual U14046EJ5V0UD
PD78F0034A, 78F0034B, 78F0034AY,
Connection pin of dedicated
flash programmer
Connection pin of dedicated
flash programmer
Connection pin of dedicated
flash programmer
Other device
Other device
Other device
Output pin
Input pin
Input pin