pca9564 NXP Semiconductors, pca9564 Datasheet - Page 20

• Manufacturer Part Number: pca9564
• Description: Parallel Bus To I2c-bus Controller
• Manufacturer: NXP Semiconductors

Philips Semiconductors
SPECIFIC APPLICATIONS
The PCA9564 is a parallel bus to I
to allow “smart” devices to interface with I
where the “smart” device does not have an integrated I
the designer does not want to “bit-bang” the I
can also be used to add more I
higher frequency, lower voltage migration path for the PCF8584 and
convert 8 bits of parallel data to a serial bus to avoid running
multiple traces across the PC board.
ADD I
As shown in Figure 14, the PCA9564 converts 8-bits of parallel data
into a multiple master capable I
microprocessors, custom ASICs, DSPs, etc., that need to interface
with I
ADD ADDITIONAL I
The PCA9564 can be used to convert 8-bit parallel data into
additional multiple master capable I
is used if the microcontroller, microprocessor, custom ASIC, DSP,
etc., already have an I
ports to interface with more I
components that cannot be located on the same bus (e.g., 100 kHz
and 400 kHz slaves on different buses so that each bus can operate
at its maximum potential).
2006 Sep 01
Parallel bus to I
MICROCONTROLLER,
MICROCONTROLLER,
MICROPROCESSOR,
MICROPROCESSOR,
Figure 15. Adding Additional I
2
C or SMBus components.
2
OR ASIC
OR ASIC
C-BUS PORT
Figure 14. Adding I
2
C port but need one or more additional I
CONTROL SIGNALS
CONTROL SIGNALS
2
C-BUS PORTS
8-BITS
2
8-BITS
C or SMBus components or
2
2
2
SDA
SCL
C-bus controller
C ports to “smart” devices, provide a
2
C port for microcontrollers,
C-bus Port Application
2
C bus controller that is designed
2
C port as shown in Figure 15. It
2
C-bus Ports Application
2
C or SMBus
PCA9564
PCA9564
2
C port. The PCA9564
2
components,
C port and
SW02109
SW02108
SDA
SCL
SDA
SCL
2
C
20
PCA8584 MIGRATION PATH
The PCA9564 does the same type of parallel to serial conversion as
the PCF8584. Although not footprint or code compatible, the
PCA9564 provides improvements such as:
1. Operating at 3.3 V and 2.5 V voltage nodes with 5 V tolerant I/Os
2. Allows interface with I
3. Built-in oscillator provides a cost effective solution since the
4. Parallel data can be exchanged at speeds up to 50 MHz allowing
CONVERT 8 BITS OF PARALLEL DATA INTO
I
Functioning as a slave transmitter, the PCA9564 can convert 8-bit
parallel data into a two-wire I
Figure 17. This would prevent having to run 8 traces across the
entire width of the PC board.
2
C-BUS SERIAL DATA STREAM
400 kHz.
external clock input is no longer required.
the use of faster processors.
MICROCONTROLLER,
MICROPROCESSOR,
Figure 17. Converting Parallel to Serial Data Application
SUPPLY VOLTAGE
2.3 – 3.6 V
4.5 – 5.5 V
OR ASIC
Figure 16. PCF8584 Migration Path
FREQUENCY
CONTROL
2
SIGNALS
400 kHz
C or SMBus components at speeds up to
00 kHz
8-BITS
2
C data stream as is shown in
PCA9564
OSCILLATOR
CLOCK INPUT
PCA9564
PCF8584
SDA
PCA9564
SCL
Product data sheet
MASTER
SW02110
SW02111
SDA
SCL
SDA
SCL