UPD78F0550MA-FAA-AX Renesas Electronics America, UPD78F0550MA-FAA-AX Datasheet - Page 333

• Manufacturer Part Number: UPD78F0550MA-FAA-AX
• Description: MCU 8BIT 16-SSOP
• Manufacturer: Renesas Electronics America
• Series: 78K0/Kx2-Lr

Specifications of UPD78F0550MA-FAA-AX

• Package / Case: *
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Speed: 10MHz
• Number Of I /o: 12
• Core Processor: 78K/0
• Program Memory Type: FLASH
• Ram Size: 384 x 8
• Program Memory Size: 4KB (4K x 8)
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Peripherals: LVD, POR, PWM, WDT
• Connectivity: I²C, LIN, UART/USART
• Core Size: 8-Bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

9.2 Configuration of Watchdog Timer
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, refer to CHAPTER 24 OPTION BYTE.
Window open period
Controlling counter operation of watchdog timer
Overflow time of watchdog timer
f
byte (0080H)
IL
/2
Control register
Setting of Watchdog Timer
controller
Clock
input
Item
Table 9-2. Setting of Option Bytes and Watchdog Timer
Watchdog timer enable
register (WDTE)
Clear, reset control
Figure 9-1. Block Diagram of Watchdog Timer
Table 9-1. Configuration of Watchdog Timer
counter
17-bit
Preliminary User’s Manual U19111EJ2V1UD
CHAPTER 9 WATCHDOG TIMER
Watchdog timer enable register (WDTE)
Count clear
signal
2
2
2
7
12
15
/f
/f
/f
error detector
IL
CPU access
IL
IL
to 2
, 2
, 2
Internal bus
14
17
10
/f
/f
/f
IL
IL
IL
,
,
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)
controller
output
Reset
Internal reset signal
333