ML610Q429-NNNTBZ03A7 Rohm Semiconductor, ML610Q429-NNNTBZ03A7 Datasheet - Page 161

• 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.
11.1 Overview
11.1.1
11.1.2
This LSI incorporates a watchdog timer (WDT) that operates at a system reset unconditionally (free-run operation) in
order to detect an undefined state of the MCU and return from that state.
If the WDT counter overflows due to the failure of clearing of the WDT counter within the WDT overflow period, the
watchdog timer requests a WDT interrupt (non-maskable interrupt). When the second overflow occurs, the watchdog
timer generates a WDT reset signal and shifts the mode to a system reset mode.
For interrupts see Chapter 5, “Interrupts,” and for WDT interrupt see Chapter 3, “Reset Function”.
• Non-maskable interrupt
• Free running (cannot be stopped)
• One of four types of overflow periods (125ms, 500ms, 2s, and 8s) selectable by software
• Reset generated by the second overflow
Figure 11-1 shows the configuration of the watchdog timer.
Watchdog Timer
Features
Configuration
WDTMOD
WDTCON
WDTMOD
T256HZ
WDTCON
Figure 11-1 Configuration of Watchdog Timer
detection
: Watchdog timer control register
: Watchdog timer mode register
“5AH”
WDT counter
detection
“0A5H”
R
WDT overflow
11 – 1
Reset interrupt
D
R
QN
Q
control
WDP
ML610Q428/ML610Q429 User’s Manual
RESET_S
System reset
WDTCON Write
Data bus
WDT reset
WDTINT
Non-maskable interrupt
Chapter 11 Watchdog Timer