UPD78F0386GK-8EU-A Renesas Electronics America, UPD78F0386GK-8EU-A Datasheet - Page 239

• 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: -

9.3 Register Controlling Watch Timer
The watch timer is controlled by the watch timer operation mode register (WTM).
Address: FF6FH
Symbol
WTM
Watch timer operation mode register (WTM)
This register sets the watch timer count clock, enables/disables operation, prescaler interval time, and 5-bit
counter operation control.
WTM is set by a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation sets WTM to 00H.
WTM7
WTM7
WTM6
WTM3
WTM1
WTM0
7
0
1
0
0
0
0
1
1
1
1
0
0
1
1
0
1
0
1
Figure 9-2. Format of Watch Timer Operation Mode Register (WTM)
After reset: 00H
f
f
Clear after operation stop
Start
Operation stop (clear both prescaler and 5-bit counter)
Operation enable
PRS
SUB
WTM6
WTM5
WTM2
/2
6
0
0
1
1
0
0
1
1
0
1
0
1
7
f
32.768 kHz
SUB
= 32.768 kHz
R/W
2
2
2
2
14
13
5
4
/f
/f
WTM5
WTM4
/f
/f
CHAPTER 9 WATCH TIMER
W
W
W
W
User’s Manual U17504EJ2V0UD
5
0
1
0
1
0
1
0
1
2
2
2
2
2
2
2
2
15.625 kHz
Watch timer count clock selection (f
f
4
5
6
7
8
9
10
11
PRS
/f
/f
/f
/f
/f
/f
WTM4
/f
/f
W
W
W
W
W
W
W
W
5-bit counter operation control
Watch timer operation enable
4
= 2 MHz
Selection of watch timer interrupt time
WTM3
Prescaler interval time selection
39.062 kHz
f
3
PRS
= 5 MHz
WTM2
2
78.125 kHz
f
PRS
W
)
= 10 MHz
WTM1
<1>
156.25 kHz
f
PRS
= 20 MHz
WTM0
<0>
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