參數(shù)資料
型號(hào)： MC33797
廠商： 飛思卡爾半導(dǎo)體(中國(guó))有限公司
英文描述： Four Channel Squib Driver IC
中文描述： 四通道爆管驅(qū)動(dòng)IC
文件頁(yè)數(shù)： 10/32頁(yè)
文件大小： 639K
代理商： MC33797
Analog Integrated Circuit Device Data
18
Freescale Semiconductor
33797
FUNCTIONAL DESCRIPTION
FUNCTIONAL DEVICE OPERATION
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
INTRODUCTION
In this section references are made to XX; e.g., in
SQB_HI_XX, SQB_LO_XX, and SENSE_XX terminals.
SQB_HI_XX refers to SQB_HI_1A, SQB_HI_1B,
SQB_HI_2A or SQB_HI_2B, SQB_LO_1A, etc.
SERIAL INTERFACE
An 8-bit shift register is provided for communication
through the serial port to a microprocessor. The four-wire SPI
interface is used to read from, and write to, the shift register.
Data written to the shift register will control the firing of the
FET switches or select a diagnostic mode. Data is
sequentially shifted into and out of the shift register, most
significant bit first.
Data read from the shift register will contain the results of
the diagnostic mode selected in the previous 8-bit write. If a
NOP command is written, all diagnostic modes are cleared
and the data in the shift registers will be read out. With any
undefined commands, all diagnostic modes are cleared and
the data in the shift registers will be read out. All functions are
set when CS goes high. All diagnostic commands are cleared
on the next valid SPI command.
SPI INTERFACE INTEGRITY CHECK
The $96 command with corresponding $69 return byte
during the next 8-bit write is used as an echo function to
diagnose the SPI integrity (refer to Table 8).
The Diagnostic Data Out bits not containing data are set to
zero.
Only 8-bit words will be accepted. Any words that are
≤7
bits or
≥9 bits will be ignored or cleared.
The second byte for command programming will be
treated as a NOP if any FET is firing. The programming
commands must be sequential or they will be treated as a
NOP.
The four-channel squib driver IC is a slave peripheral
device designed to interface to a Freescale SPI or other serial
peripheral interface. Data is read on the rising edge of CLK,
and data is transferred out on the rising edge of CLK. On the
falling edge of CSB, the IC configures itself for one of two SPI
modes. If CLK is low, the IC will configure itself to be in
Freescale SPI mode (see Figure 5). If CLK is high, the IC will
configure itself to be in an alternative SCI mode (see
Figure 6). In both cases, data is still read off the rising edge
and transferred off the falling edge of the CLK. When the IC
is deselected (CSB goes high), then D0 is a high-impedance
output.
Response bit 7 of command $C8 (refer to Table 7,
page 22) is hard-wired to “1” or “0” to identify the squib IC as
a four- or two-channel squib driver IC. When a $C8 command
is issued for the four-channel squib driver IC, the response bit
7 is set to a “0”. When a $C8 command is issued for the two-
channel squib driver IC, the response bit 7 is set to a “1”.
STANDARD SQUIB IC FUNCTION
The standard squib IC application utilizes the high- and
low-side squib drivers from the same squib driver ICs (see
Figure 7, Standard Squib Firing).
The SENSE_XX (1A, 1B, 2A, 2B) terminal is connected to
SQB_LO_XX (1A, 1B, 2A, 2B). Squib diagnostics are
conducted using this terminal. In the standard mode, the $C2
(SQUIB_LO_XX_CONT) command will be used to check
continuity of the low-side driver from the SQB_LO_XX
terminal (1A, 1B, 2A, 2B) to the low-side driver FET
The low-side driver continuity is checked during the
continuity test. The driver continuity information will be
cleared after the information is transmitted on the next valid
SPI command.
EXAMPLE—STANDARD SQUIB COMMAND SPI
SEQUENCE FROM MICROCONTROLLER
TX: Request squib short-to-battery/GND diagnostic mea-
surement ($C1).
RX: Previous executed command information.
TX: Request squib 1A resistance measurement ($D0–
$D3).
RX: Receive results from short-to-battery/GND diagnos-
tics.
TX: Request squib 1B resistance measurement ($D0–
$D3).
RX: Receive measured squib 1A resistance information.
TX: Request squib 2A resistance measurement ($D0–
$D3).
RX: Receive measured squib 1B resistance information.
TX: Request squib 2B resistance measurement ($D0–
$D3).
RX: Receive measured squib 2A resistance information
TX: Request continuity command ($C2).
RX: Receive measured squib 2B resistance information
TX: Request another command sequence.
RX: Receive low-side driver 1A, 1B, 2A, and 2B continuity
information. Latches will be cleared after data trans-
ferred from the squib IC (clear on rising edge of chip
select).
相關(guān)PDF資料
PDF描述
MC44C402 MTS Stereo Encoder
MC44C402AC MTS Stereo Encoder
MC44C402ACR2 MTS Stereo Encoder
MC54HCT174AJ HCT SERIES, POSITIVE EDGE TRIGGERED D FLIP-FLOP, TRUE OUTPUT, CDIP16
MC56F8367MPY60 16-BIT, 120 MHz, OTHER DSP, PQFP160
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC33797BPEW 功能描述:功率驅(qū)動(dòng)器IC Four Channel Squib Dr RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時(shí)間: 下降時(shí)間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube
MC33797BPEWR2 功能描述:功率驅(qū)動(dòng)器IC Four Channel Squib Dr RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時(shí)間: 下降時(shí)間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube
MC33813AE 功能描述:功率驅(qū)動(dòng)器IC 1 CYL SM ENG CONTROL IC RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時(shí)間: 下降時(shí)間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube
MC33813AER2 功能描述:功率驅(qū)動(dòng)器IC 1 CYL SM ENG CONTROL IC RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時(shí)間: 下降時(shí)間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube
MC33814AE 功能描述:功率驅(qū)動(dòng)器IC 2 CYL SM ENG CONTROL IC RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時(shí)間: 下降時(shí)間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*