ML610Q409-NNNTBZ03A7 Rohm Semiconductor, ML610Q409-NNNTBZ03A7 Datasheet - Page 166

• 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

11.2.2 Watchdog Timer Control Register (WDTCON)
Address: 0F00EH
Access: W
Access size: 8-bit
Initial value: 00H
WDTCON is a special function register (SFR) to clear the WDT counter.
When WDTCON is read, the value of the internal pointer (WDP) is read from bit 0.
[Description of Bits]
Note:
When the WDT interrupt (WDTINT) occurs by the first WDT counter overflow, the counter and the internal pointer
(WDP) are initialiaed for a half cycle of low speed clock (about 15us). During the time period that they are initialized,
writing to WDTCON is disable and the logic of WDP does not change. Therefore, in the case of that you have
program codes handle to clear the WDT when the first overflow WDT interrupt occurs and also the codes run at
high-speed system clock, please check the WDP gets reversed after writing to WDTCON to see if the writing was
surely successful. For example of the program code, see Section 11.3.1, "Handling example when you do not want to
use the watch dog timer".
Initial value
WDTCON
• WDP/d0 (bit 0)
• d7-d0 (bits 7-0)
R/W
The value of the internal pointer (WDP) is read from this bit. The WDP is reset to “0” at the system reset or WDT
counter overflow and is inverted every writing to WDTCON.
This bit is used to write data to clear the WDT counter. The WDT counter can be cleared by writing "5AH" with
the internal pointer (WDP) is "0", then writing "0A5H" with the WDP "1".
R/W
d7
7
0
R/W
d6
6
0
R/W
d5
5
0
11-3
R/W
d4
4
0
ML610Q407/ML610Q408/ML610Q409 User's Manual
R/W
d3
3
0
R/W
d2
2
0
Chapter 11 Watchdog Timer
R/W
d1
0
1
WDP/d0
R/W
0
0