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參數(shù)資料
| 型號(hào)： | MC33884 |
| 廠商： | 飛思卡爾半導(dǎo)體(中國)有限公司 |
| 英文描述： | Switch Monitor Interface(開關(guān)監(jiān)控器接口) |
| 中文描述： | 開關(guān)顯示器接口（開關(guān)監(jiān)控器接口） |
| 文件頁數(shù)： | 9/20頁 |
| 文件大小： | 331K |
| 代理商： | MC33884 |
9
MOTOROLA TSG IC DEVICE DATA
CIRCUIT DESCRIPTION
Introduction
The MC33884 is a monolithic integrated circuit designed to
interface between external electrical system switches and low
voltage microprocessors via a Serial Peripheral Interface
(SPI). The MC33884 monitors the OPEN/CLOSED status of
multiple external switches used in a system. The MC33884
features 4 programmable Switch–to–Ground or Battery sense
inputs,
6
Switch–to–Ground
Switch–to–Battery sense inputs, programmable Wake–up
Timer, programmable Interrupt Timer, and programmable
wetting current settings. All inputs are protected for ESD
transients when implemented with the appropriate ESD
capacitor.
There are numerous applications for this device in aircraft,
aerospace, robotic, process & control, automotive, and
security systems. Potential applications exist where switch
status verification for safety, fault tolerant operation, or
process control function purposes are critical.
The MC33884 has four modes of operation: Sleep, Normal,
Polling, and Polling + INT Timer.
The MC33884 is designed to provide a robust interface
between system switch contacts and a microprocessor. Each
MC33884 input provides the switch contact with high levels of
wetting current during switch closure. After the input switch
has been closed for 20 ms, the wetting current is reduced,
hence reducing power dissipation in the IC. The response to
a SPI command will always return Switch Status,
Master/Slave, INT Flag, and Mode settings. The following
section describes the programming modes and features of the
MC33884.
sense
inputs,
2
Microprocessor Interface
The MC33884 directly interfaces to 3.3 or 5.0 V MCU. SPI
serial clock frequencies in excess of 5.0 MHz may be used for
programming and reading switch input status. Figure 4 shows
the configuration between an MCU and one MC33884.
16BitShiftRegister
MC68HCXX
Microcontroller
Receive
Buffer
Parallel
Ports
MC33884
To
Logic
SCLK
MISO
SO
SI
MOSI
RSTB
CS
INTB
INT
16BitShiftRegister
Figure 4. SPI Interface with Microprocessor
The MC33884, though originally designed for automotive
use, is very useful in a variety of other applications, i.e.,
computer, telecommunications, and industrial fields. It is
parametrically specified over an input battery/supply voltage
of 9.0 to 16.0 V but is designed to operate over a considerably
wider range of 5.5 to 26.5 V.
Two or more MC33884 devices may be used in a module
system when implemented in a parallel or serial configuration.
Figure 5 and Figure 6 show the parallel and serial
configurations respectively. When using the Serial
configuration, 32 clock cycles are required for a complete
transfer of data to the MC33884.
16 BitShift Register
MC68HCXX
Microcontroller
Parallel
Ports
MC33884
SO
SI
RSTB
CS
INTB
SCLK
MISO
MOSI
INT
MC33884
SO
SI
RSTB
CS
INTB
SCLK
SCLK
Figure 5. SPI Parallel Interface with Microprocessor
16 Bit Shift Register
MC68HCXX
Microcontroller
Parallel
Ports
MC33884
SO
SI
RSTB
CS
INTB
SCLK
MISO
MOSI
INT
MC33884
SO
SI
RSTB
CS
INTB
SCLK
SCLK
Figure 6. SPI Serial Interface with Microprocessor
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
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| MC33886DHR2 | 功能描述:IC H-BRIDGE 5.0A 20-HSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 電機(jī)和風(fēng)扇控制器，驅(qū)動(dòng)器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:直流電機(jī)驅(qū)動(dòng)器，步進(jìn)電機(jī)驅(qū)動(dòng)器 評(píng)估套件:- 輸出數(shù):1 或 2 電流 - 輸出:750mA 電壓 - 負(fù)載:10 V ~ 40 V 電源電壓:4.5 V ~ 5.5 V 工作溫度:-20°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-BFSOP（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:24-SOP 包裝:Digi-Reel® 其它名稱:MTS62C19A-HS105DKR |
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