參數(shù)資料
型號(hào)： MC68HC05E16CFB
廠商： MOTOROLA INC
元件分類： 微控制器/微處理器
英文描述： 16256 bytes of user ROM, 320bytes of EPROM and 352 bytes of RAM
中文描述： 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQFP44
封裝： QFP-44
文件頁(yè)數(shù)： 44/96頁(yè)
文件大?。?/td> 3045K
代理商： MC68HC05E16CFB
MC68HC05SR3
Freescale
6-3
TIMER
6
6.2
Timer Control Register (TCR)
The TCR enables the software to control the operation of the timer.
TIF — Timer Interrupt Flag
1 (set)
–
The timer has reached a count of zero.
0 (clear) –
The timer has not reached a count of zero.
The timer interrupt flag is set when the 8-bit counter decrements to zero. This bit is cleared on
reset, or by writing a “0” to the TIF bit.
TIM — Timer Interrupt Mask
1 (set)
–
Timer interrupt request to the CPU is masked (disabled).
0 (clear) –
Timer interrupt request to the CPU is not masked (enabled).
A reset sets this bit to one; it must then be cleared by software to enable the timer interrupt to the
CPU. This timer interrupt mask only masks timer interrupt request to the CPU, and does not affect
counting of the 8-bit counter or the setting of TIF.
TCEX — Timer Clock EXternal
TINE — Timer INput Enable
These two bits selects the source of the timer clock. Reset or power-on clears these bits to zero.
PRER — PREscaler Reset
Writing a “1” to this write-only bit will reset the prescaler to zero, which is necessary for any new
counts set by writing to the Timer Data Register.This bit always reads as zero, and is not affected
by reset.
Address
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
State
on reset
$09
TIF
TIM
TCEX
TINE
PRER
PRE2
PRE1
PRE0
0100 -100
TCEX
TINE
Clock Source
00
Internal clock to timer
01
“AND” of internal clock and TIMER pin to timer
10
Input clock to timer disabled
11
TIMER pin to timer
TPG
47
05SR3.Book Page 3 Thursday, August 4, 2005 1:08 PM
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC68HC05E16CFU 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:16256 bytes of user ROM, 320bytes of EPROM and 352 bytes of RAM
MC68HC05E16FB 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:16256 bytes of user ROM, 320bytes of EPROM and 352 bytes of RAM
MC68HC05E16FU 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:16256 bytes of user ROM, 320bytes of EPROM and 352 bytes of RAM
MC68HC05E5 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:General Release Specification
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