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參數(shù)資料
| 型號： | MC33976 |
| 廠商： | 飛思卡爾半導體(中國)有限公司 |
| 英文描述： | Dual Gauge Driver with Configurable Response Time(帶可設置響應時間的雙標尺驅(qū)動器) |
| 中文描述： | 雙計驅(qū)動器，可配置的響應時間（帶可設置響應時間的雙標尺驅(qū)動器） |
| 文件頁數(shù)： | 10/40頁 |
| 文件大?。?/td> | 5332K |
| 代理商： | MC33976 |
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Analog Integrated Circuit Device Data
Freescale Semiconductor
10
33976
FUNCTIONAL DESCRIPTION
INTRODUCTION
FUNCTIONAL DESCRIPTION
INTRODUCTION
This 33976 is a single-packaged, Serial Peripheral
Interface (SPI) controlled, dual step motor gauge driver
integrated circuit (IC). This monolithic IC consists of four dual
output H-Bridge coil drivers and the associated control logic.
Each pair of H-Bridge drivers is used to automatically control
the speed, direction, and magnitude of current through the
two coils of a two-phase instrumentation step motor, similar
to an MMT-licensed AFIC 6405 or a Switec MS-X15.xxx
motor.
The 33976 is ideal for use in automotive instrumentation
systems requiring distributed and flexible step motor gauge
driving. The device also eases the transition to step motors
from air core motors by emulating the air core pointer
movement with little additional processor bandwidth
utilization.
SPI PROTOCOL DESCRIPTION
The SPI interface has a full-duplex, three-wire
synchronous, 16-bit serial synchronous interface data
transfer and four I/O lines associated with it: Chip Select (
CS
),
Serial Clock (SCLK), Serial Input (SI), and Serial Output
(SO). The SI/SO pins of the 33976 follow a first in/first out
(D15/D0) protocol with both input and output words
transferring the most significant bit first. All inputs are
compatible with 5.0 V CMOS logic levels.
FUNCTIONAL PIN DESCRIPTION
H-BRIDGE OUTPUTS 0 (COS0+, COS0-, SIN0+,
SIN0-)
Each pin is the output pin of a half bridge, designed to
source or sink current. The H-Bridge pins linearly drive the
sine and cosine coils of two separate step motors to provide
four-quadrant operation.
GROUND (GND)
These pins serve as the ground for the source of the low-
side output transistors as well as the logic portion of the
device. They also help dissipate heat from the device.
CHIP SELECT (CS)
The
CS
pin enables communication with the master
device. When this pin is in a logic [0] state, the 33976 is
capable of transferring information to, and receiving
information from, the master. The 33976 latches data in from
the Input Shift registers to the addressed registers on the
rising edge of
CS
. The output driver on the SO pin is enabled
when
CS
is logic [0]. When
CS
is logic high, signals at the
SCLK and SI pins are ignored and the SO pin is tri-stated
(high impedance).
CS
will only be transitioned from a logic [1]
state to a logic [0] state when SCLK is a logic [0].
CS
has an
internal pull-up (l
UP
) connected to the pin, as specified in the
section of the Static Electrical Characteristics table entitled
CONTROL I/O
, which is found on page
6
.
SERIAL CLOCK (SCLK)
SCLK clocks the Internal Shift registers of the 33976
device. The SI pin accepts data into the Input Shift register on
the falling edge of the SCLK signal, while the Serial Output
pin (SO) shifts data information out of the SO Line Driver on
the rising edge of the SCLK signal. It is important that the
SCLK pin be in a logic [0] state whenever the
CS
makes any
transition. SCLK has an internal pull down (l
DWN
), as
specified in the section of the Static Electrical Characteristics
table entitled
CONTROL I/O
, which is found on page
6
. When
CS
is logic [1], signals at the SCLK and SI pins are ignored
and SO is tri-stated (high impedance). Refer to the data
transfer timing diagrams in
Figure 6
and
Figure 7
on
page 12
.
SERIAL OUTPUT (SO)
The SO data pin is a tri-stateable output from the Shift
register. The Status register bits are the first 16 bits shifted
out. Those bits are followed by the message bits clocked in
FIFO, when the device is in a daisy chain connection or being
sent words that are multiples of 16 bits. Data is shifted on the
rising edge of the SCLK signal. The SO pin will remain in a
high impedance state until the
CS
pin is put into a logic low
state.
SERIAL INPUT (SI)
The SI pin is the input of the SPI. Serial input information
is read on the falling edge of SCLK. A 16-bit stream of serial
data is required on the SI pin, beginning with the most
significant bit (MSB). Messages that are not multiples of 16
bits (e.g., daisy chained device messages) are ignored. After
transmitting a 16-bit word, the
CS
pin must be de-asserted
(logic [1]) before transmitting a new word. SI information is
ignored when
CS
is in a logic high state.
MULTIPLEXED OUTPUT (RTZ)
This is the multiplexed output pin of the non-driven coil
during a Return to Zero (RTZ) event.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MC33981ABHFK | 功能描述:電源開關 IC - 配電 HF 4.0MOHM RDSON SWITCH RoHS:否 制造商:Exar 輸出端數(shù)量:1 開啟電阻（最大值）:85 mOhms 開啟時間（最大值）:400 us 關閉時間（最大值）:20 us 工作電源電壓:3.2 V to 6.5 V 電源電流（最大值）: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOT-23-5 |
| MC33981ABHFKR2 | 功能描述:電源開關 IC - 配電 HF 4.0MOHM RDSON SWITCH RoHS:否 制造商:Exar 輸出端數(shù)量:1 開啟電阻（最大值）:85 mOhms 開啟時間（最大值）:400 us 關閉時間（最大值）:20 us 工作電源電壓:3.2 V to 6.5 V 電源電流（最大值）: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOT-23-5 |
| MC33981BHFK | 功能描述:電源開關 IC - 配電 HF 4.0MOHM RDSON SWITCH RoHS:否 制造商:Exar 輸出端數(shù)量:1 開啟電阻（最大值）:85 mOhms 開啟時間（最大值）:400 us 關閉時間（最大值）:20 us 工作電源電壓:3.2 V to 6.5 V 電源電流（最大值）: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOT-23-5 |
| MC33981BHFKR2 | 功能描述:電源開關 IC - 配電 HF 4.0MOHM RDSON SWITCH RoHS:否 制造商:Exar 輸出端數(shù)量:1 開啟電阻（最大值）:85 mOhms 開啟時間（最大值）:400 us 關閉時間（最大值）:20 us 工作電源電壓:3.2 V to 6.5 V 電源電流（最大值）: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOT-23-5 |
| MC33981BPNA | 功能描述:電源開關 IC - 配電 VIPER RoHS:否 制造商:Exar 輸出端數(shù)量:1 開啟電阻（最大值）:85 mOhms 開啟時間（最大值）:400 us 關閉時間（最大值）:20 us 工作電源電壓:3.2 V to 6.5 V 電源電流（最大值）: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOT-23-5 |
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