UPD78F0386GK-8EU-A Renesas Electronics America, UPD78F0386GK-8EU-A Datasheet - Page 242

• Manufacturer Part Number: UPD78F0386GK-8EU-A
• Description: MCU 96KB FLASH 5KB RAM
• Manufacturer: Renesas Electronics America
• Series: 78K0/Lx2r

Specifications of UPD78F0386GK-8EU-A

• Core Processor: 78K/0
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: 3-Wire SIO, I²C, LIN, UART/USART
• Peripherals: LCD, LVD, POR, PWM, WDT
• Number Of I /o: 26
• Program Memory Size: 96KB (96K x 8)
• Program Memory Type: FLASH
• Ram Size: 5K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -

9.5 Cautions for Watch Timer
setting bits 0 (WTM0) and 1 (WTM1) of WTM to 1), the interval until the first interrupt request signal (INTWT) is
generated after the register is set does not exactly match the specification made with bits 2 and 3 (WTM2, WTM3) of
WTM. Subsequently, however, the INTWT signal is generated at the specified intervals.
240
Remark
When operation of the watch timer and 5-bit counter is enabled by the watch timer mode control register (WTM) (by
It takes 0.515625 seconds for the first INTWT to be generated (2
INTWT is then generated every 0.5 seconds.
Count clock
Watch timer
interrupt INTWT
Interval timer
interrupt INTWTI
f
Figures in parentheses are for operation with f
Figure 9-4. Example of Generation of Watch Timer Interrupt Request Signal (INTWT)
W
: Watch timer clock frequency
5-bit counter
WTM0, WTM1
INTWT
Figure 9-3. Operation Timing of Watch Timer/Interval Timer
Start
0H
Interrupt time of watch timer (0.5 s)
Interval time
(When Interrupt Period = 0.5 s)
(T)
CHAPTER 9 WATCH TIMER
0.515625 s
User’s Manual U17504EJ2V0UD
W
= 32.768 kHz (WTM7 = 1, WTM3, WTM2 = 0, 0)
0.5 s
Overflow
9
1/32768 = 0.015625 s longer).
Interrupt time of watch timer (0.5 s)
T
0.5 s
Overflow