Serial Communications Devices; I2C Interface - ZiLOG UM014605-0208 User Manual

Table 2. LED Cathode/Modem/Trigger
Function/Port E Bit No
Cathode Column 0
Cathode Column 1
Cathode Column 2
Cathode Column 3
Cathode Column 4
Note: Column 0 = Leftmost Column
Table 3. LED Addressing
Function/Port, Bit No
D3
D4
D1
D2

Serial Communications Devices

2
I C Interface
The Z8 Encore! is compatible with I
PCA8550). The I
serial data (SDA) line and a serial clock (SCL) line.
The I
Having a PCA8550 on board enables configuration of the Expansion
Module. The PCA8550 is a 4-bit multiplexer that selects four bits of data
either from a non-volatile register or from the input pins. In this case four
input pins are left unconnected and only a non-volatile register is selected
as a source of data. Only three bits are used. Currently this chip is not
used by the software provided with the board, so you can use it to your
UM014605-0208
®
Z8 Encore!
PE[5]
X
2
C controller consists of two bidirectional bus lines, a
2
C Controller operates in Master mode to transmit and receive data.
Flash Microcontroller Development Kit
4 3
X
X
PE[6]
X
2
C protocol (in this case the
Z8 Encore!® Evaluation Board
User Manual
2 1 0
X
X
X
PE[7] PG[7]
X
X
15