參數(shù)資料
型號: S1C621A0F0A0100
元件分類: 微控制器/微處理器
英文描述: MICROCONTROLLER, PQFP80
封裝: QFP-80
文件頁數(shù): 148/161頁
文件大小: 1037K
代理商: S1C621A0F0A0100
I-62
EPSON
S1C621A0 TECHNICAL HARDWARE
CHAPTER 3: PERIPHERAL CIRCUITS (Initial Reset)
Oscillation detection
circuit
With RESET = 1, the oscillation detection circuit receives
fOSC1 and makes a f-V conversion. If the OSC1 frequency is
greater than a certain value, the oscillation output goes to 0
to clear the reset state. The time required for f-V conversion
depends on fOSC1, and is several milliseconds with fOSC1 =
32 kHz. This time gives a delay for clearing the reset state
from the RESET input going to 1.
If fOSC1 stops for some reason, the oscillation detection
circuit triggers a reset operation.
Watchdog timer
The watchdog timer guards the CPU against an unexpected
overrun. It uses the OSC1 clock as the source oscillation
frequency to perform the increment operation. If the watch-
dog timer fails to be reset in 3–4 seconds with fOSC1 = 32
kHz, the CPU will be initialized at initial reset.
To reset the watchdog timer, write 1 in the 0F1H, D3 bit
(WDRST) on the memory space. Writing 0 in the bit causes
no reset.
WDRST (0F1H, D3)
Write 1:
Reset and restart watchdog timer
Write 0:
No operation
Read:
Always 0
A program overrun can be detected by programming the
watchdog timer to be reset in the main routine.
The watchdog timer continues counting even with the
CPU in the halt state. If the CPU stays in the halt state
for 3–4 seconds, the watchdog timer triggers the CPU to
be reset.
The watchdog timer function can be nullified by using the
mask option.
相關(guān)PDF資料
PDF描述
S1C63158D0A010P 4-BIT, FLASH, 4 MHz, MICROCONTROLLER, UUC53
S1C7XXXF00E199 16-BIT, 90 MHz, RISC MICROCONTROLLER, PQFP
S2041 PHOTO TRANSISTOR DETECTOR
S3P44R10 TRIGGER OUTPUT SOLID STATE RELAY, 4000 V ISOLATION-MAX
S3S12P128J0VQK 16-BIT, MROM, 1.05 MHz, MICROCONTROLLER, PQFP80
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
S1C63004 制造商:EPSON 制造商全稱:EPSON 功能描述:CMOS 4-bit Single Chip Microcontroller
S1C63008 制造商:EPSON 制造商全稱:EPSON 功能描述:CMOS 4-bit Single Chip Microcontroller
S1C63016 制造商:EPSON 制造商全稱:EPSON 功能描述:CMOS 4-bit Single Chip Microcontroller
S1C63158 制造商:EPSON 制造商全稱:EPSON 功能描述:4-bit Single Chip Microcomputer
S1C63408 制造商:EPSON 制造商全稱:EPSON 功能描述:4-bit Single Chip Microcomputer