UPD78F0034BGC-8BS-A Renesas Electronics America, UPD78F0034BGC-8BS-A Datasheet - Page 241

• 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

9.6 Cautions Related to 8-Bit Timer/Event Counters 50, 51
(1) Timer start errors
(2) Setting STOP mode or main system clock stop mode
(3) TM5n (n = 0, 1) reading during timer operation
An error of up to one clock may occur in the time required for a match signal to be generated after timer start.
This is because 8-bit timer counter 5n (TM5n) is started asynchronously to the count pulse.
Except when TI5n input is selected, always set TCE5n = 0 before setting the STOP mode or main system clock
stop mode.
The timer may malfunction when the main system clock starts oscillating.
When reading TM5n during operation, the count clock stops temporarily, so select a count clock with a high/low-
level waveform longer than two cycles of the CPU clock. For example, in the case where the CPU clock (f
is f
Remark n = 0, 1
X
, when the selected count clock is f
Count pulse
TM5n count
Figure 9-14. Start Timing of 8-Bit Timer Counter 5n (TM5n)
CHAPTER 9 8-BIT TIMER/EVENT COUNTERS 50, 51
00H
Timer start
X
User’s Manual U14046EJ5V0UD
/4 or below, it can be read.
01H
02H
03H
04H
239
CPU
)