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| 型號(hào)： | DSPB56371AF150 |
| 廠商： | Freescale Semiconductor |
| 文件頁(yè)數(shù)： | 9/68頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC DSP 24BIT 150MHZ 80-LQFP |
| 標(biāo)準(zhǔn)包裝： | 90 |
| 系列： | DSP56K/Symphony |
| 類(lèi)型： | 音頻處理器 |
| 接口： | 主機(jī)接口，I²C，SAI，SPI |
| 時(shí)鐘速率： | 150MHz |
| 非易失內(nèi)存： | ROM（384 kB） |
| 芯片上RAM： | 264kB |
| 電壓 - 輸入/輸出： | 3.30V |
| 電壓 - 核心： | 1.25V |
| 工作溫度： | -40°C ~ 115°C |
| 安裝類(lèi)型： | 表面貼裝 |
| 封裝/外殼： | 80-LQFP |
| 供應(yīng)商設(shè)備封裝： | 80-LQFP（14x14） |
| 包裝： | 托盤(pán) |
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Signal/Connection Descriptions
DSP56371 Data Sheet, Rev. 4.1
Freescale Semiconductor
17
Table 7. Serial Host Interface Signals
Signal
Name
Signal Type
State
during
Reset
Signal Description
SCK
Input or
output
Tri-stated
SPI Serial Clock—The SCK signal is an output when the SPI is configured as a
master and a Schmitt-trigger input when the SPI is configured as a slave. When
the SPI is configured as a master, the SCK signal is derived from the internal SHI
clock generator. When the SPI is configured as a slave, the SCK signal is an
input, and the clock signal from the external master synchronizes the data
transfer. The SCK signal is ignored by the SPI if it is defined as a slave and the
slave select (SS) signal is not asserted. In both the master and slave SPI devices,
data is shifted on one edge of the SCK signal and is sampled on the opposite
edge where data is stable. Edge polarity is determined by the SPI transfer
protocol.
SCL
Input or
output
I2C Serial Clock—SCL carries the clock for I2C bus transactions in the I2C mode.
SCL is a Schmitt-trigger input when configured as a slave and an open-drain
output when configured as a master. SCL should be connected to VDD through a
pull-up resistor.
This signal is tri-stated during hardware, software and individual reset. Thus,
there is no need for an external pull-up in this state.
Internal Pull up resistor.
This input is 5 V tolerant.
MISO
Input or
output
Tri-stated
SPI Master-In-Slave-Out—When the SPI is configured as a master, MISO is the
master data input line. The MISO signal is used in conjunction with the MOSI
signal for transmitting and receiving serial data. This signal is a Schmitt-trigger
input when configured for the SPI Master mode, an output when configured for
the SPI Slave mode, and tri-stated if configured for the SPI Slave mode when SS
is deasserted. An external pull-up resistor is not required for SPI operation.
SDA
Input or
open-drain
output
I2C Data and Acknowledge—In I2C mode, SDA is a Schmitt-trigger input when
receiving and an open-drain output when transmitting. SDA should be connected
to VDD through a pull-up resistor. SDA carries the data for I
2C transactions. The
data in SDA must be stable during the high period of SCL. The data in SDA is
only allowed to change when SCL is low. When the bus is free, SDA is high. The
SDA line is only allowed to change during the time SCL is high in the case of start
and stop events. A high-to-low transition of the SDA line while SCL is high is a
unique situation, and it is defined as the start event. A low-to-high transition of
SDA while SCL is high is a unique situation defined as the stop event.
This signal is tri-stated during hardware, software and individual reset. Thus,
there is no need for an external pull-up in this state.
Internal Pull up resistor.
This input is 5 V tolerant.
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