M30622SAFP#U5 Renesas Electronics America, M30622SAFP#U5 Datasheet - Page 475

• Manufacturer Part Number: M30622SAFP#U5
• Description: IC M16C MPU ROMLESS 100QFP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/60r

Specifications of M30622SAFP#U5

• Core Processor: M16C/60
• Core Size: 16-Bit
• Speed: 16MHz
• Connectivity: SIO, UART/USART
• Peripherals: DMA, PWM, WDT
• Number Of I /o: 50
• Program Memory Type: ROMless
• Ram Size: 3K x 8
• Voltage - Supply (vcc/vdd): 4.2 V ~ 5.5 V
• Data Converters: A/D 10x10b, D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 100-QFP
• For Use With: 867-1000 - KIT QUICK START RENESAS 62PM3062PT3-CPE-3 - EMULATOR COMPACT M16C/62P/30P
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

2-156
Watchdog Timer
Operation
Figure 2.11.3. Operation timing of watchdog timer
2.11.2 Operation of Watchdog Timer
The following is an operation of the watchdog timer. Figure 2.11.3 shows the operation timing, and Figure
2.11.4 shows the set-up procedure.
Write signal to the
watchdog timer
start register
(1) Writing to the watchdog timer start register initializes the watchdog timer to 7FFF
(2) With a count in progress, writing to the watchdog timer start register again initializes the
(3) Either executing the WAIT instruction or going to the stopped state causes the watchdog
(4) If the watchdog timer underflows, it is initialized to 7FFF
7FFF
causes it to start a down count.
watchdog timer to 7FFF
timer to hold the count in progress and to stop counting. The watchdog timer resumes count-
ing after returning from the execution of the WAIT instruction or from the stopped state.
time, a watchdog timer interrupt occurs.
0000
“H”
“L”
16
16
(1) Start count
16
and causes it to resume counting.
(2) Write operation
(3) In stopped state, or WAIT
instruction is executing, etc
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
16
and continues counting. At this
(4) Generate
M16C / 62A Group
Mitsubishi microcomputers
watchdog timer
interrupt
16
and