參數(shù)資料
型號: MC68HC05K3CDWR2
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PDSO16
封裝: SOIC-16
文件頁數(shù): 80/132頁
文件大?。?/td> 1188K
代理商: MC68HC05K3CDWR2
Resets
Internal Resets
MC68HC05K3 — Revision 4.0
Technical Data
MOTOROLA
Resets
51
“brown-out” condition). After the oscillator becomes active, a mask
option selects an oscillator stabilization delay of 16 or 4064 cycles of the
internal processor bus clock (PH2).
The POR generates the RST signal that resets the CPU. If any other
reset function is active at the end of this stabilization delay, the RST
signal remains in the reset condition until the other reset condition(s)
end(s).
5.4.2 Computer Operating Properly Reset (COPR)
A COP watchdog timer can be enabled by a mask option. The internal
COP reset (COPR) is generated automatically by a timeout of the COP
watchdog timer. This timeout occurs if the counter in the COP watchdog
timer is not reset (cleared) within a specific time by a user program reset
sequence. Refer to 8.4 COP Watchdog Timer for more information on
this timeout feature.
The COPR generates the RST signal that resets the CPU and other
peripherals. If any other reset function is active at the end of the COPR
reset signal, the RST signal remains in the reset condition until the other
reset condition(s) end(s).
The COP watchdog reset activates the internal pulldown device
connected to the RESET pin for one cycle of the internal processor bus
clock, PH2.
5.4.3 Illegal Address Reset (ILADR)
The internal ILADR reset is generated when an instruction opcode fetch
occurs from an address in the I/O address area ($0000–$001F). The
ILADR generates the RST signal that resets the CPU and other
peripherals. If any other reset function is active at the end of the ILADR
reset signal, the RST signal remains in the reset condition until the other
reset condition(s) end(s). The ILADR reset activates the internal
pulldown device connected to the RESET pin for one cycle of the
internal processor bus clock, PH2.
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