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參數(shù)資料
| 型號： | MCZ33781EK |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | SPECIALTY MICROPROCESSOR CIRCUIT, PDSO32 |
| 封裝： | 0.65 MM, LEAD FREE, SOIC-32 |
| 文件頁數(shù)： | 15/44頁 |
| 文件大?。?/td> | 940K |
| 代理商： | MCZ33781EK |
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Analog Integrated Circuit Device Data
22
Freescale Semiconductor
33781
FUNCTIONAL DEVICE OPERATION
LOGIC COMMANDS AND REGISTERS
FUNCTIONAL DEVICE OPERATION
LOGIC COMMANDS AND REGISTERS
SPI0 COMMUNICATIONS
All SPI0 transactions are either 16 or 32-bits long. They
start with a command byte and can be followed by 1 or 3
bytes of data. The start of an SPI transaction is signaled by
CS0
being asserted low. The first bit sent (bit 7) of the first
byte signals a read or write (write = 1) of data. The last seven
bits (bits 6–0) of the command set a pointer to the desired
register. The 33781 uses 16-bit commands to access control
registers, and 32-bit commands to access both control
registers, and to queue up transfers over the DBUS.
diagram of 32-bit transfers. In these multi-byte transfers, as
long as CS0 is asserted low, each additional byte sent over
the SPI will be a read/write of data to the sequential next
register.
33781 utilizes, transmit, and receive addressable FIFOs
for sending commands and responses over the DBUS. There
are separate command and response registers, and a
transmit queue is used to allow up to 4 bus commands to be
scheduled for each bus. The transmit queue schedules
commands as a circular buffer, accessing the appropriate
command register for the command and data to be sent as
the bus becomes available. Data received in response to the
commands is queued up for sequential response back to the
MCU during the next set of SPI commands. If an SPI0
attempts to write to a transmit register that is not empty the
new command will be ignored.
Figure 14 shows an example of a write operation. During
the first byte of the SPI transaction, the first MOSI bit is 1
(write), and the last seven are the address of the register to
be accessed. During this command byte, MISO returns
dummy bits set to all zeros. During the next SPI transactions,
MOSI updates the data in the register pointed to in the
previous byte with new data, while reading back the old data
via MISO.
During an SPI0 transaction the 33781 checks for SPI
framing errors. A framing error is defined as any number of
clocks received that is not either 16 or 32. If that occurs, all
bits sent by the SPI master are discarded and no registers
are update.
Figure 13. SPI016-Bit Burst Transfer Example.
Figure 14. SPI0 32-Bit Burst Transfer Example
The bit definitions for SPI0 depend on the type of SPI
transfer, and if the transfer will be to/from the addressable
FIFOs, whether the DBUS for that channel is set for Long
Words or Enhanced Short words.
Figure 13 shows the bit encoding for 16-bit SPI0 burst
transfers. In this transfer the first byte contains the address of
the control register to be written to or read from, and the
second byte is the data to be written. The SPI0 response is
the data from that register, latched at the falling edge of CS0.
If the address pointed to by the first byte is not a control
WRITE COMMAND
POINT TO REGISTER
00000000
DATA TO
DATA FROM
REGISTER
CS0
SCLK
MOSI
MISO
REGISTER
WRITE COMMAND
POINT TO D0R0H
CS0
SCLK
MOSI
MISO
DATA TO D0R0H
DATA TO D0R0L
XXXXXXXX
00000000
DATA FROM D0R0H
DATA FROM D0R0L
DATA FROM D0R0STAT
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MCZ33781EKR2 | 功能描述:輸入/輸出控制器接口集成電路 DBUS2 MASTER STND RoHS:否 制造商:Silicon Labs 產(chǎn)品: 輸入/輸出端數(shù)量: 工作電源電壓: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-64 封裝:Tray |
| MCZ33784EF | 功能描述:加速計 - 板上安裝 DBUS2 SENSOR INTERFACE RoHS:否 制造商:Murata 傳感軸:Double 加速:12 g 靈敏度: 封裝 / 箱體: 輸出類型:Analog 數(shù)字輸出 - 位數(shù):11 bit 電源電壓-最大:5.25 V 電源電壓-最小:4.75 V 電源電流:4 mA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C |
| MCZ33784EF/R2- | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:DSI 2.02 Sensor Interface |
| MCZ33784EFR2 | 功能描述:加速計 - 板上安裝 DBUS2 SENSOR INTERFACE RoHS:否 制造商:Murata 傳感軸:Double 加速:12 g 靈敏度: 封裝 / 箱體: 輸出類型:Analog 數(shù)字輸出 - 位數(shù):11 bit 電源電壓-最大:5.25 V 電源電壓-最小:4.75 V 電源電流:4 mA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C |
| MCZ33789AE | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC Airbag ASSP RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
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