UPD78F0034BGC-8BS-A Renesas Electronics America, UPD78F0034BGC-8BS-A Datasheet - Page 178

• 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

176
Remark When using the subsystem clock, replace X1 and X2 with XT1 and XT2, respectively. Also, insert
Caution
(c) Wiring near high fluctuating current
resistors in series on the XT2 side.
2. When X2 and XT1 are wired in parallel, the crosstalk noise of X2 may increase with XT1,
(e) Signals are fetched
resulting in malfunction.
To prevent that from occurring, it is recommended to wire X2 and XT1 so that they are not
in parallel, and to connect the IC pin between X2 and XT1 directly to V
X2
X2
Figure 7-6. Examples of Incorrect Oscillator Connection (2/2)
X1
X1
V
V
SS1
SS1
CHAPTER 7 CLOCK GENERATOR
User’s Manual U14046EJ5V0UD
(d) Current flowing through ground line of
oscillator (potential at points A, B, and
C fluctuates)
V
DD0
Pnm
X2
A
High current
X1
B
SS1
.
V
SS1
C