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Chapter 4 Micro Controller
4.1 Features of SAA5667 Micro Controller
SAA5667
is
a
single-chip
microcontroller
based
on
80C51
microcontroller, which is integrated with On-Screen Display (OSD) and
Data Capture and display function for Teletext.
It has 32 I/O ports via individual addressable controls, which are 5 V
tolerant digital inputs and I/O. There are two port lines with 8 mA sink
for direct drive of LED. The byte level I²C-bus up to 400 kHz dual port
I/O.
Besides, SAA5667 has large Character ROM that allows up to 1020
characters of 12 * 10 pixels. There are 64 Characters for OSD.
There is a single crystal oscillator for micro-controller, OSD and data
capture. The power reduction mode will be Idle, Standby and Power
down.
Figure 4.1 shows the block diagram of SAA5667.
Figure 4.1 SAA5667 block diagram.
19
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