UPD78F0138HGK-9ET-A Renesas Electronics America, UPD78F0138HGK-9ET-A Datasheet - Page 227

• Manufacturer Part Number: UPD78F0138HGK-9ET-A
• Description: MCU 8BIT 60K FLASH 64TQFP
• Manufacturer: Renesas Electronics America
• Series: 78K0/Kx1+r

Specifications of UPD78F0138HGK-9ET-A

• Core Processor: 78K/0
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: 3-Wire SIO, LIN, UART/USART
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 42
• Program Memory Size: 60KB (60K x 8)
• Program Memory Type: FLASH
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 2.5 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

9.1 Functions of Watch Timer
The watch timer has the following functions.
The watch timer and the interval timer can be used simultaneously.
Figure 9-1 shows the watch timer block diagram.
Remark
Watch timer
Interval timer
f
X
/2
f
XT
7
f
f
f
f
X
XT
W
WX
: High-speed system clock oscillation frequency
: Watch timer clock frequency
: Subsystem clock oscillation frequency
: f
f
W
W
or f
f
W
/2
W
4
/2
f
W
9
/2
11-bit prescaler
5
f
W
/2
Figure 9-1. Block Diagram of Watch Timer
6
f
WTM7
W
/2
CHAPTER 9 WATCH TIMER
7
Clear
f
W
/2
8
User’s Manual U16899EJ3V0UD
WTM6
f
W
/2
10
f
W
Internal bus
/2
11
f
WTM5
W
/2
9
WTM4
f
WX
5-bit counter
WTM3
Watch timer operation
mode register (WTM)
Clear
WTM2
f
f
WX
WX
WTM1
/2
/2
4
5
WTM0
INTWT
INTWTI
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