参数资料
型号: MC68HC705SR3CPE
厂商: Freescale Semiconductor
文件页数: 44/96页
文件大小: 0K
描述: IC MCU 3.75K 2.1MHZ OTP 40-DIP
标准包装: 9
系列: HC05
核心处理器: HC05
芯体尺寸: 8-位
速度: 4MHz
外围设备: LED,POR
输入/输出数: 32
程序存储器容量: 3.75KB(3.75K x 8)
程序存储器类型: OTP
RAM 容量: 192 x 8
电压 - 电源 (Vcc/Vdd): 3 V ~ 5.5 V
数据转换器: A/D 4x8b
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 40-DIP(0.600",15.24mm)
包装: 管件
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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MC68HC705SR3CPE 制造商:Freescale Semiconductor 功能描述:8-Bit Microcontroller IC
MC68HC705SR3PE 功能描述:IC MCU 3.75K 2.1MHZ OTP 40-DIP RoHS:是 类别:集成电路 (IC) >> 嵌入式 - 微控制器, 系列:HC05 标准包装:1 系列:AVR® ATmega 核心处理器:AVR 芯体尺寸:8-位 速度:16MHz 连通性:I²C,SPI,UART/USART 外围设备:欠压检测/复位,POR,PWM,WDT 输入/输出数:32 程序存储器容量:32KB(16K x 16) 程序存储器类型:闪存 EEPROM 大小:1K x 8 RAM 容量:2K x 8 电压 - 电源 (Vcc/Vdd):2.7 V ~ 5.5 V 数据转换器:A/D 8x10b 振荡器型:内部 工作温度:-40°C ~ 125°C 封装/外壳:44-TQFP 包装:剪切带 (CT) 其它名称:ATMEGA324P-B15AZCT
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