ML610Q409-NNNTBZ03A7 Rohm Semiconductor, ML610Q409-NNNTBZ03A7 Datasheet - Page 168

• Manufacturer Part Number: ML610Q409-NNNTBZ03A7
• Description: MCU 8BIT 16K FLASH 4CH 100-TQFP
• Manufacturer: Rohm Semiconductor
• Series: -r

Specifications of ML610Q409-NNNTBZ03A7

• Core Processor: nX-U8/100
• Core Size: 8-Bit
• Speed: 2MHz
• Connectivity: SSP, UART/USART
• Peripherals: LCD, Melody Driver, POR, PWM, WDT
• Number Of I /o: 22
• Program Memory Size: 16KB (8K x 16)
• Program Memory Type: FLASH
• Eeprom Size: -
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 1.25 V ~ 3.6 V
• Data Converters: A/D 2x16b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 70°C
• Package / Case: 100-TFQFP
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

11.3 Description of Operation
The WDT counter starts counting after the system reset has been released and the low-speed clock oscillation start..
The WDT counter can be cleared by writing "5AH" with the internal pointer (WDP) is "0", then writing "0A5H" with
the WDP "1".
The WDP is reset to “0” at the system reset or WDT counter overflow and is inverted every writing to WDTCON.
When the WDT counter cannot be cleared within the WDT counter overflow period (T
(WDTINT) occurs. If the WDT counter is not cleared even by the software processing performed following the
watchdog timer interrupt and overflow occurs again, WDT reset occurs and the mode shifts to a system reset mode.
For the overflow period (T
mode register (WDTMOD).
Clear the WDT counter within the clear period of the WDT counter (T
WDT1
0
0
1
1
WOV
WDT0
) of the WDT counter, one of 125ms, 500ms, 2s, and 8s can be selected by the watchdog
0
1
0
1
Table 11-1 Clear Period of WDT Counter
2000ms
8000ms
125ms
500ms
T
WOV
11-5
ML610Q407/ML610Q408/ML610Q409 User's Manual
WCL
) shown in Table 11-1.
Approx. 1996 ms
Approx. 7996 ms
Approxi. 121ms
Approx. 496 ms
T
WCL
WOV
Chapter 11 Watchdog Timer
), a watchdog timer interrupt