參數(shù)資料
型號： MC68HC05E6FB
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQFP44
封裝： PLASTIC, QFP-44
文件頁數(shù)： 84/140頁
文件大?。?/td> 1584K
代理商： MC68HC05E6FB
Core Timer
MC68HC05E6 — Rev. 1.0
Core Timer
COP clear register
(COPCLR)
If the COP circuit times out, an internal reset is generated and the normal
reset vector is fetched. COP timeout is prevented by writing a ‘0’ to bit 0
(CCLR) of the COPCLR register (address $1FF0). When the COP is
cleared, only the final divide-by-eight stage is cleared (see Figure 10).
Core timer registers
Core timer control
and status register
(CTCSR)
CTOF — Core timer overflow
1 = This read-only flag is set whenever a core timer overflow
occurs.
0 = No core timer overflow has occurred.
This bit is set when the core timer counter register rolls over from $FF
to $00; an interrupt request will be generated if CTOFE is set. When
set, the bit may be cleared by writing a ‘1’ to the RCTOF bit.
RTIF — Real time interrupt flag
1 = This read-only flag is set when the pre-selected RTI period has
elapsed. The RTI period is selected using the RT0 and RT1
bits as shown in Table 8.
0 = The pre-selected RTI period has not elapsed.
This bit is set when the output of the chosen stage becomes active;
an interrupt request will be generated if RTIE is set. When set, the bit
may be cleared by writing a ‘1’ to the RRTIF bit.
Address bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
State
on reset
COPCLR
$1FF0
CCLR 0000 0000
Address bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
State
on reset
Core timer control/status (CTCSR
) $0008 CTOF
RTIF CTOFE RTIE RCTOF RRTIF
RT1
RT0 uu00 0011
4-ctimer
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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MC68HC05E6MDW 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit
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