UPD78F0500AMC-CAB-AX Renesas Electronics America, UPD78F0500AMC-CAB-AX Datasheet - Page 397

• Manufacturer Part Number: UPD78F0500AMC-CAB-AX
• Description: MCU 8BIT 30SSOP
• Manufacturer: Renesas Electronics America
• Series: 78K0/Kx2r

Specifications of UPD78F0500AMC-CAB-AX

• Core Processor: 78K/0
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: 3-Wire SIO, I²C, LIN, UART/USART
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 23
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

78K0/Kx2
11.2 Configuration of Watchdog Timer
R01UH0008EJ0401 Rev.4.01
Jul 15, 2010
WINDOW1 and WINDOW0
The watchdog timer includes the following hardware.
How the counter operation is controlled, overflow time, and window open period are set by the option byte.
of option byte (0080H)
WDCS2 to WDCS0 of
option byte (0080H)
CPU access signal
WDTON of option
Remark For the option byte, see CHAPTER 26 OPTION BYTE.
f
RL
Window open period
Controlling counter operation of watchdog timer
Overflow time of watchdog timer
byte (0080H)
/2
Control register
Setting of Watchdog Timer
controller
Clock
input
Item
Table 11-2. Setting of Option Bytes and Watchdog Timer
Watchdog timer enable
register (WDTE)
Figure 11-1. Block Diagram of Watchdog Timer
Clear, reset control
Table 11-1. Configuration of Watchdog Timer
counter
17-bit
Watchdog timer enable register (WDTE)
Count clear
signal
2
2
10
17
error detector
CPU access
/f
/f
RL
RL
Internal bus
to
determination
Selector
Window size
Bits 6 and 5 (WINDOW1, WINDOW0)
Bit 4 (WDTON)
Bits 3 to 1 (WDCS2 to WDCS0)
signal
Configuration
Overflow
signal
Option Byte (0080H)
CHAPTER 11 WATCHDOG TIMER
controller
output
Reset
Internal reset signal
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