dsp56004 Freescale Semiconductor, Inc, dsp56004 Datasheet - Page 17

• Manufacturer Part Number: dsp56004
• Description: Symphonytm Audio Dsp Family 24-bit Digital Signal Processors
• Manufacturer: Freescale Semiconductor, Inc

MOTOROLA
MISO
SDA
MOSI
HA0
Signal Name
Table 1-8 Serial Host Interface (SHI) signals (Continued)
Input or
Input or
Input or
Output
Output
Output
Signal
Input
Type
Freescale Semiconductor, Inc.
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Tri-stated
Tri-stated
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during
Reset
State
DSP56004/D, Rev. 3
SPI Master-In-Slave-Out (MISO)—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.
I
SDA is a Schmitt-trigger input when receiving and an
open-drain output when transmitting. SDA should be
connected to V
the data for I
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 an unique situation, and is defined
as the Start event. A low-to-high transition of SDA while
SCL is high is an unique situation, and is defined as the
Stop event.
Note:
SPI Master-Out-Slave-In (MOSI)—When the SPI is
configured as a master, MOSI is the master data output
line. The MOSI signal is used in conjunction with the
MISO signal for transmitting and receiving serial data.
MOSI is the slave data input line when the SPI is
configured as a slave. This signal is a Schmitt-trigger
input when configured for the SPI Slave mode.
I
trigger input when configured for the I
configured for I
form the slave device address. HA0 is ignored when the
SHI is configured for the I
Note:
2
2
C Serial Data and Acknowledge (SDA)—In I
C Slave Address 0 (HA0)—This signal uses a Schmitt-
This line is tri-stated during hardware reset, software
reset, or individual reset (no need for external pull-up
in this state).
This signal is tri-stated during hardware reset,
software reset, or individual reset (no need for
external pull-up in this state).
2
C transactions. The data in SDA must be
CC
2
C Slave mode, the HA0 signal is used to
through a pull-up resistor. SDA carries
Signal Description
Signal/Connection Descriptions
2
C Master mode.
Serial Host Interface (SHI)
2
C mode. When
2
C mode,
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