ML610Q429-NNNTBZ03A7 Rohm Semiconductor, ML610Q429-NNNTBZ03A7 Datasheet - Page 41

• 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: -

3.2
3.2.1
3.2.2
• POR (bit 0)
• XSTR (bit 1)
• WDTR (bit 2)
Address: 0F001H
Access: R/W
Access size: 8 bits
Initial value: Undefined
RSTAT is a special function register (SFR) that indicates the causes by which the reset is generated.
At the occurrence of reset, the contents of RSTAT are not initialized, while the bit indicating the cause of the reset is
set to ”1”. When checking the reset cause using this function, perform write operation to RSTAT in advance and
initialize the contents of RSTAT to “00H”.
[Description of Bits]
Note:
No flag is provided that indicates the occurrence of reset by the RESET_N pin.
Initial value
The POR bit is a flag that indicates that the power-on reset is generated. This bit is set to “1” when powered on.
The XSTR bit is a flag that indicates the generation of low-speed oscillation stop detect reset. When low-speed
oscillation stops for the period specified by the low-speed oscillation stop detection time (TSTOP) or more, this bit is
set to “1”.
The WSDTR is a flag that indicates that the watchdog timer reset is generated. This bit is set to “1” when the reset by
overflow of the watchdog timer is generated.
RSTAT
Address
0F001H
R/W
WDTR
XSTR
POR
Description of Registers
0
1
0
1
0
1
List of Registers
Reset Status Register (RSTAT)
Power-on reset not generated
Power-on reset generated
Low-speed oscillation stop detect reset not occurred
Low-speed oscillation stop detect reset occurred
Watchdog timer reset not occurred
Watchdog timer reset occurred
R/W
―
7
0
Reset status register
Name
R/W
―
0
6
R/W
―
5
0
Symbol (Byte)
Description
Description
Description
R/W
RSTAT
―
4
0
3 – 2
R/W
―
3
0
Symbol (Word)
ML610Q428/ML610Q429 User’s Manual
⎯
WDTR
R/W
2
0
Chapter 3 Reset Function
R/W
R/W
XSTR
R/W
1
x
Size
8
POR
R/W
0
1
Initial value
⎯