ML610Q429-NNNTBZ03A7 Rohm Semiconductor, ML610Q429-NNNTBZ03A7 Datasheet - Page 165

• Manufacturer Part Number: ML610Q429-NNNTBZ03A7
• Description: MCU 8BIT 48K FLASH 128-TQFP
• Manufacturer: Rohm Semiconductor

Specifications of ML610Q429-NNNTBZ03A7

• Core Processor: nX-U8/100
• Core Size: 8-Bit
• Speed: 4.2MHz
• Connectivity: I²C, SSP, UART/USART
• Peripherals: LCD, Melody Driver, POR, PWM, WDT
• Number Of I /o: 20
• Program Memory Size: 48KB (24K x 16)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 1.1 V ~ 3.6 V
• Data Converters: A/D 2x12b, 2x24b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 70°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

11.3 Description of Operation
The WDT counter starts counting after the system reset has been released and the low-speed clock oscillation start..
Write "5AH" when the internal pointer (WDP) is "0"and then the WDT counter is cleared by writing "0A5H" when
WDP is "1".
WDP is reset to “0” at the time of system reset or when the WDT counter overflows and is inverted whenever data is
written 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 (TWOV) of the WDT counter, one of 125ms, 500ms, 2s, and 8s can be selected by the
watchdog mode register (WDTMOD).
Clear the WDT counter within the clear period of the WDT counter shown in Table 11-1.
WDT1
0
0
1
1
WDT0
0
1
0
1
Table 11-1 Clear Period of WDT Counter
2000 ms
8000 ms
125 ms
500 ms
T
WOV
11 – 5
ML610Q428/ML610Q429 User’s Manual
Approx. 1996 ms
Approx. 7996 ms
Approx. 121 ms
Approx. 496 ms
T
Chapter 11 Watchdog Timer
WCL
WOV
), a watchdog timer interrupt