OM6277,598 NXP Semiconductors, OM6277,598 Datasheet - Page 10

• Manufacturer Part Number: OM6277,598
• Description: DEMO BOARD FOR PCA9564
• Manufacturer: NXP Semiconductors

Specifications of OM6277,598

• Main Purpose: Interface, I2C Controller
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: PCA9564
• Primary Attributes: I2C Bus Controller, 1 8-Bit GPIO, 1 8-Bit LED Dimmer
• Secondary Attributes: 8 Momentary Switches, 23 LEDs
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• Other names: 568-4001; 935283226598

Use of other 80C51 type Philips microcontrollers
Any Philips 80C51 microcontroller pin to pin compatible with the P89LV51Rx2 device can be used as to interface with
the PCA9564.
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•
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Use of any other non 80C51 type master devices
Any other non-80C51 type microprocessor, DSP, ASIC or emulator can be used with the PCA9564 evaluation board.
When an external device is used:
1) Remove the P89LV51RD2 microcontroller from its socket
2) Apply the 8-bit parallel bus data on connector JP16. Built-in pull up resistors can be disconnected by opening the
3) Apply PCA9564 control signals and monitor Interrupt pin (open drain output) on connector JP14
Caution: Since the PCA9564 is 5.5 V tolerant, no voltage greater than 5.5 V must be applied to the parallel bus
data and the control signals
Communication between the 2 microcontrollers
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Power supply:
It can be chosen from:
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If an external voltage is applied to the microcontroller, digital signals interfacing with the PCA9564 will be pulled
up to this external voltage value.
Caution: Since the PCA9564 is 5.5 V tolerant, no voltage greater than 5.5 V must be applied to the
VDDMCU+ pin.
Microcontroller with built-in I
Port P1.6 (SCL) and P1.7 (SDA) can be connected to the internal I
and JP13.
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ISP mode:
ISP mode for P89C51Rx+/Rx2/66x devices can also be entered by forcing the /PSEN pin to LOW. This is
performed through the jumper JP9.
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jumper VDDMCU+.
Note: RESET pushbutton (S9) cannot longer be used when VDDMCU+ is open
Communication through the I
Jumpers JP6 and JP7 allow to connect or split the I
I
I
JP13 are closed).
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Since the PCA9564 is a multi-master capable device, both microcontrollers can be a master in the same bus (when
JP6 and JP7 closed). If both masters try to take control of the I
be performed between the P89LV51RD2/PCA9564 and the P89LPC932.
Communication through RxD and TxD pins:
An additional non-I
TxD pins.
P89LV51 TxD pin can be connected to the P89LPC932 RxD pin through jumper JP17
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2
2
C-bus 1 contains the following devices: P89LV51RD2/ PCA9564, PCA9531, PCF85116 and PCA9554A
C-bus 2 contains the following devices: P89LPC932, P89xx51 with built-in SCL/SDA (when jumpers JP12 and
The internal 3.3 V regulated voltage: Jumper VDDMCU+ closed
An external regulated voltage:
JP12 open: P1.6 not connected to SCL2
JP12 closed: P1.6 connected to SCL2
JP13 open: P1.7 not connected to SDA2
JP13 closed: P1.7 connected to SDA2
JP9 open:
JP9 closed:
JP6 open:
JP6 closed: SCL Bus 1 and SCL Bus 2 are connected together
JP7 open:
JP7 closed: SDA Bus 1 and SDA Bus 2 are connected together
JP17 open:
JP17 closed: pins are connected together
PSEN
SCL Bus 1 and SCL Bus 2 are not connected together
SDA Bus 1 and SDA Bus 2 are not connected together
PSEN
pins are not connected together
2
C communication channel between the 2 microcontrollers is available through their RxD and
floating
forced to ground
2
2
C-bus:
C interface:
Jumper VDDMCU+ open, external voltage applied to VCCMCU+
2
C-bus in one same bus or 2 different buses.
10
2
C-bus at the same time, an arbitration procedure will
2
C-bus 2 (connector JP5) through jumpers JP12