UPD78F0138HGK-9ET-A Renesas Electronics America, UPD78F0138HGK-9ET-A Datasheet - Page 237
UPD78F0138HGK-9ET-A
Manufacturer Part Number
UPD78F0138HGK-9ET-A
Description
MCU 8BIT 60K FLASH 64TQFP
Manufacturer
Renesas Electronics America
Series
78K0/Kx1+r
Datasheet
1.UPD78F0138HGK-9ET-A.pdf
(568 pages)
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
-
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10.3 Registers Controlling Watchdog Timer
(1) Watchdog timer mode register (WDTM)
Address: FF98H
The watchdog timer is controlled by the following two registers.
Symbol
WDTM
This register sets the overflow time and operation clock of the watchdog timer.
This register can be set by an 8-bit memory manipulation instruction and can be read many times, but can be
written only once after reset is released.
RESET input sets this register to 67H.
Watchdog timer mode register (WDTM)
Watchdog timer enable register (WDTE)
Notes 1.
WDCS4
WDCS2
7
0
0
0
1
0
0
0
0
1
1
1
1
Note 1
Note 2
2.
After reset: 67H
WDCS3
WDCS1
If “internal oscillator cannot be stopped” is specified by the option byte, this cannot be set.
The internal oscillation clock will be selected no matter what value is written.
Reset is released at the maximum cycle (WDCS2, 1, 0 = 1, 1, 1).
Figure 10-2. Format of Watchdog Timer Mode Register (WDTM)
6
1
0
1
0
0
1
1
0
0
1
1
Note 1
Note 2
WDCS0
Internal oscillation clock (f
High-speed system clock (f
Watchdog timer operation stopped
R/W
0
1
0
1
0
1
0
1
5
1
CHAPTER 10 WATCHDOG TIMER
Note 2
User’s Manual U16899EJ3V0UD
During internal oscillation clock
2
2
2
2
2
2
2
2
11
12
13
14
15
16
17
18
WDCS4
/f
/f
/f
/f
/f
/f
/f
/f
R
R
R
R
R
R
R
R
4
(4.27 ms)
(8.53 ms)
(17.07 ms)
(34.13 ms)
(68.27 ms)
(136.53 ms)
(273.07 ms)
(546.13 ms)
operation
Operation clock selection
R
)
XP
WDCS3
)
3
Overflow time setting
WDCS2
2
During high-speed system clock
2
2
2
2
2
2
2
2
13
14
15
16
17
18
19
20
/f
/f
/f
/f
/f
/f
/f
/f
XP
XP
XP
XP
XP
XP
XP
XP
(819.2 s)
(1.64 ms)
(3.28 ms)
(6.55 ms)
(13.11 ms)
(26.21 ms)
(52.43 ms)
(104.86 ms)
WDCS1
operation
1
WDCS0
0
235
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