
ML610Q421/ML610Q422/ML610421 User’s Manual
Chapter 3 Reset Function
3 – 1
3. Reset Function
3.1 Overview
This LSI has the five reset functions shown below. If any of the five reset conditions is satisfied, this LSI enters system
reset mode.
•
Reset by the RESET_N pin
•
Reset by power-on detection
•
Reset by the low-speed oscillation stop detection
•
Reset by the 2
nd
watchdog timer (WDT) overflow
•
Software reset by execution of the BRK instruction
3.1.1
Features
•
The RESER_N pin has an internal pull-up resistor
•
The low-speeed oscillation stop deteciton time is 3 ms (typ.)
•
250 ms, 1 sec, 4 sec, or 16 sec can be selected as the 2
nd
watchdog timer (WDT) overflow period
•
Built-in reset status register (RSTAT) indicating the reset generation causes
•
Only the CPU is reset by the BRK instruction (neither the RAM area nor the SFR area are reset).
3.1.2
Configuration
Figure 3-1 shows the configuration of the reset generation circuit.
RSTAT:
Reset status register
Figure 3-1 Configuration of Reset Generation Circuit
3.1.3
List of Pin
Pin name
I/O
Description
RESET_N
I
Reset input pin
Power-on reset
Low-speed Oscillation
stop detect reset
RESET_N
Reset signal
V
DD
WDT reset
RSTAT
Data bus
Содержание ML610421
Страница 1: ...ML610Q421 ML610Q422 ML610421 User s Manual Issue Date Feb 9 2015 FEUL610Q421 06...
Страница 15: ...Chapter 1 Overview...
Страница 44: ...Chapter 2 CPU and Memory Space...
Страница 49: ...Chapter 3 Reset Function...
Страница 53: ...Chapter 4 MCU Control Function...
Страница 69: ...Chapter 5 Interrupts INTs...
Страница 93: ...Chapter 6 Clock Generation Circuit...
Страница 110: ...Chapter 7 Time Base Counter...
Страница 121: ...Chapter 8 Capture...
Страница 129: ...Chapter 9 1 kHz Timer 1kHzTM...
Страница 135: ...Chapter 10 Timers...
Страница 160: ...Chapter 11 PWM...
Страница 172: ...Chapter 12 Watchdog Timer...
Страница 180: ...Chapter 13 Synchronous Serial Port...
Страница 195: ...Chapter 14 UART...
Страница 216: ...Chapter 15 I2 C Bus Interface...
Страница 231: ...Chapter 16 NMI Pin...
Страница 237: ...Chapter 17 Port 0...
Страница 246: ...Chapter 18 Port 1...
Страница 252: ...Chapter 19 Port 2...
Страница 259: ...Chapter 20 Port 3...
Страница 270: ...Chapter 21 Port 4...
Страница 282: ...Chapter 22 Port A...
Страница 290: ...Chapter 23 Melody Driver...
Страница 304: ...Chapter 24 RC Oscillation Type A D Converter...
Страница 327: ...Chapter 25 Successive Approximation Type A D Converter...
Страница 338: ...Chapter 26 LCD Drivers...
Страница 371: ...Chapter 27 Battery Level Detector...
Страница 378: ...Chapter 28 Power Supply Circuit...
Страница 381: ...Chapter 29 On Chip Debug Function...
Страница 384: ...Appendixes...
Страница 435: ...Revision History...