- 您现在的位置：买卖IC网 > PDF目录359132 > MC33291L (飞思卡尔半导体(中国)有限公司) Eight Output Switch with Serial Peripheral Interface I/O(带SPI接口的八输出开关) PDF资料下载
参数资料
| 型号： | MC33291L |
| 厂商： | 飞思卡尔半导体(中国)有限公司 |
| 英文描述： | Eight Output Switch with Serial Peripheral Interface I/O(带SPI接口的八输出开关) |
| 中文描述： | 8个串行外围接口的I / O（带的SPI接口的八输出开关输出开关） |
| 文件页数： | 14/24页 |
| 文件大小： | 633K |
| 代理商： | MC33291L |
33291L
14
Go to: www.freescale.com
Figure 14. Multiple MCU SPI Control
FUNCTIONAL PIN DESCRIPTION
CS Pin
The 33291L receives its MCU communication through the
CS pin. Whenever this pin is in a logic low state, data can be
transferred from the MCU to the 33291L by way of the SI pin
and from the 33291L to the MCU through the SO pin. Clocked-
in data from the MCU is transferred from the 33291L Shift
register and latched into the power outputs on the rising edge
of the CS signal. On the falling edge of the CS signal, drain
status information is transferred from the power outputs then
loaded into the Shift register of the device. The CS pin also
controls the output driver of the serial output (SO) pin.
Whenever the CS pin goes to a logic low state, the SO pin
output driver is enabled allowing information to be transferred
from the 33291L to the MCU. To avoid data corruption or the
generation of spurious data, it is essential the high-to-low
transition of the CS signal occur only when SCLK is in a logic
low state.
SCLK Pin
The system clock (SCLK) pin clocks the internal shift
registers of the 33291L. The serial input (SI) pin accepts data
into the Input Shift register on the falling edge of the SCLK
signal while the serial output (SO) pin shifts data information out
of the SO line driver on the rising edge of the SCLK signal.
False clocking of the Shift register must be avoided to
guarantee validity of data. It is essential the SCLK pin be in a
logic low state whenever the chip select bar (CS) pin makes any
transition. For this reason, it is recommended, though not
absolutely necessary, the SCLK pin be kept in a low logic state
as long as the device is not accessed (CS in logic high state).
When CS is in a logic high state, signals at the SCLK and SI
pins are ignored and SO is tri-stated (high impedance). See the
Data Transfer Timing diagram in Figure 16.
SI Pin
This pin is for the input of serial instruction (SI) data. SI is
read on the falling edge of SCLK. A logic high state present on
this pin when the SCLK signal rises will program a specific
output OFF. In turn, the pin turns OFF the specific output on the
rising edge of the CS signal. Conversely, a logic low state
present on the SI pin will program the output ON, In turn, the pin
turns ON the specific output on the rising edge of the CS signal.
To program the eight outputs of the 33291L ON or OFF, an
8-bit serial stream of data is required to be synchronously
entered into the SI pin starting with Output 7, followed by Output
6, Output 5, and so on, to Output 0. Referring to Figure 16, the
DO bit is the most significant bit (MSB) corresponding to Output
7. For each rise of the SCLK signal, with CS held in a logic low
state, a data-bit instruction (ON or OFF) is synchronously
loaded into the Shift register per the data-bit SI state. The Shift
SI
SO
SCLK
CS
8-Bit
33291L
SI
SO
SCLK
CS
8-Bit
33291L
SI
SO
SCLK
CS
8-Bit
33291L
8 Outputs
8 Outputs
8 Outputs
V
DD
V
DD
B0
B1
B0
B1
MC68XX
Microcontroller
SPI
(Master)
A0
A1
A2
A0
A1
A2
MC68XX
Microcontroller
SPI
(Alternate Master)
Parallel
Ports
8-Bit
Parallel
Ports
SCLK
MISO
MOSI
SCLK
MISO
MOSI
SS
SS
8-Bit
F
Freescale Semiconductor, Inc.
For More Information On This Product,
n
.
相关PDF资料 |
PDF描述 |
|---|---|
| MC33291 | Eight Output Switch with Serial Peripheral Interface I/O(带SPI接口的八输出开关) |
| MC33298 | Eight Output Switch with Serial Peripheral Interface I/O(带SPI接口的八输出开关) |
| MC33385 | QUAD LOW SIDE DRIVER(四低端驱动器) |
| MC33388 | Fault Tolerant CAN Interface(容错CAN接口) |
| MC33389 | System Basis Chip with Low Speed Fault Tolerant CAN(带低速容错CAN接口的系统基片) |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MC33291LDW | 功能描述:IC SWITCH 8X L-SIDE W/SPI 24SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - MOSFET，电桥驱动器 - 内部开关 系列:- 标准包装:1,000 系列:- 类型:高端/低端驱动器 输入类型:SPI 输出数:8 导通状态电阻:850 毫欧，1.6 欧姆 电流 - 输出 / 通道:205mA，410mA 电流 - 峰值输出:500mA，1A 电源电压:9 V ~ 16 V 工作温度:-40°C ~ 150°C 安装类型:表面贴装 封装/外壳:20-SOIC（0.295"，7.50mm 宽） 供应商设备封装:PG-DSO-20-45 包装:带卷 (TR) |
| MC33292 | 制造商:SPC Multicomp 功能描述:HEATSINK TO220 10.2/W NOTCHED 制造商:SPC Multicomp 功能描述:HEATSINK TO220 10.2C/W NOTCHED 制造商:PRIVATE LABEL 功能描述:HEATSINK TO220 10.2C/W NOTCHED, Packages Cooled:TO-220, Thermal Resistance:10.2 制造商:SPC Multicomp 功能描述:HEAT SINK, Packages Cooled:TO-220, Thermal Resistance:10.2C/W, External Height - Imperial:1.496", External Height - Metric:38mm, External Width - Imperial:1.358", External Width - Metric:34.5mm, External Length - Imperial:0.492" , RoHS Compliant: Yes |
| MC33293 | 制造商:SPC Multicomp 功能描述:CLIP 001 制造商:SPC Multicomp 功能描述:CLIP; Fixing Type:Clip; For Use With:Heat Sinks (MC33285, MC33286, MC33287, MC33288, MC33289, MC33290, MC33291, MC33292); External Length:37.08mm; External Width:3.99mm; Clip Style:Mounting Clip; Length:37.08mm ;RoHS Compliant: Yes |
| MC33293ATV | 制造商:Motorola Inc 功能描述:3 A 4 CHANNEL, BUF OR INV BASED PRPHL DRVR, PZFM15 |
| MC33294 | 制造商:SPC Multicomp 功能描述:CLIP 002 制造商:SPC Multicomp 功能描述:CLIP; Fixing Type:Clip; For Use With:Heat Sinks (MC33272, MC33274); External Length:37.1mm; External Width:7.54mm; Clip Style:Mounting Clip; Length:37.1mm; Overall Length:37.1mm ;RoHS Compliant: Yes |
发布紧急采购，3分钟左右您将得到回复。