參數(shù)資料
型號： MC705JJ7CDWE
廠商： Freescale Semiconductor
文件頁數(shù)： 11/164頁
文件大?。?/td> 0K
描述： IC MCU 8BIT 224B RAM 20-SOIC
標準包裝： 38
系列： HC05
核心處理器： HC05
芯體尺寸： 8-位
速度： 2.1MHz
連通性： SIO
外圍設備： POR，溫度傳感器，WDT
輸入/輸出數(shù)： 14
程序存儲器容量： 6KB（6K x 8）
程序存儲器類型： OTP
RAM 容量： 224 x 8
電壓 - 電源 (Vcc/Vdd)： 2.7 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 4x12b
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 85°C
封裝/外殼： 20-SOIC（0.295"，7.50mm 寬）
包裝： 管件
Programmable Timer
MC68HC705JJ7 MC68HC705JP7 Advance Information Data Sheet, Rev. 4.1
108
Freescale Semiconductor
When the free-running counter rolls over from $FFFF to $0000, the timer overflow flag bit (TOF) is set in
the TSR. When the TOF is set, it can generate an interrupt if the timer overflow interrupt enable bit (TOIE)
is also set in the TCR. The TOF flag bit can only be reset by reading the TMRL after reading the TSR.
Other than clearing any possible TOF flags, reading the TMRH and TMRL in any order or any number of
times does not have any effect on the 16-bit free-running counter.
NOTE
To prevent interrupts from occurring between readings of the TMRH and
TMRL, set the I bit in the condition code register (CCR) before reading
TMRH and clear the I bit after reading TMRL.
11.3 Alternate Counter Registers
The functional block diagram of the 16-bit free-running timer counter and alternate counter registers is
shown in Figure 11-4. The alternate counter registers behave the same as the timer registers, except that
any reads of the alternate counter will not have any effect on the TOF flag bit and timer interrupts. The
alternate counter registers include a transparent buffer latch on the LSB of the 16-bit timer counter.
Figure 11-4. Alternate Counter Block Diagram
The alternate counter registers (ACRH and ACRL) shown in Figure 11-5 are read-only locations which
contain the current high and low bytes of the 16-bit free-running counter. Writing to the alternate counter
registers has no effect. Reset of the device presets the timer counter to $FFFC.
The ACRL latch is a transparent read of the LSB until a read of the ACRH takes place. A read of the ACRH
latches the LSB into the ACRL location until the ACRL is again read. The latched value remains fixed even
Address:
$001A
Bit 7
654321
Bit 0
Read:
Bit 15
14
13
12
11
10
9
Bit 8
Write:
Reset:
11111111
Address:
$001B
Bit 7
654321
Bit 0
Read:
Bit 7
654321
Bit 0
Write:
Reset:
11111100
= Unimplemented
Figure 11-5. Alternate Counter Registers (ACRH and ACRL)
ACRH ($001A)
TMR LSB
16-BIT COUNTER
÷ 4
INTERNAL
(OSC
÷ 2)
RESET
CLOCK
ACRL ($001B)
INTERNAL
$FFFC
DATA
READ
ACRH
READ
ACRL
READ
LATCH
BUS
相關PDF資料
PDF描述
VI-B1H-IY-F4 CONVERTER MOD DC/DC 52V 50W
VE-B43-IX-B1 CONVERTER MOD DC/DC 24V 75W
AD724JRZ-RL IC ENCODER RGB TO NTSC 16SOIC TR
VE-B42-IX-B1 CONVERTER MOD DC/DC 15V 75W
VI-B1F-IY-F3 CONVERTER MOD DC/DC 72V 50W
相關代理商/技術參數(shù)
參數(shù)描述
MC705JJ7CDWE 制造商:Freescale Semiconductor 功能描述:8-Bit Microcontroller IC
MC705JP7CPE 功能描述:8位微控制器 -MCU 8B MCU 224 BYTES RAM RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
MC705JP7CPE 制造商:Freescale Semiconductor 功能描述:IC 8BIT MCU 68HC05 2.1MHZ DIP-28
MC705K1CP 制造商:Motorola Inc 功能描述:16 PIN DIP INTEGRATED CIRCUIT
MC705L16CFUE 功能描述:8位微控制器 -MCU 8B MCU W/ EPROM RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
發(fā)布緊急采購，3分鐘左右您將得到回復。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*