SAB80C517-M16 SIEMENS [Siemens Semiconductor Group], SAB80C517-M16 Datasheet - Page 93
SAB80C517-M16
Manufacturer Part Number
SAB80C517-M16
Description
8-Bit CMOS Single-Chip Microcontroller
Manufacturer
SIEMENS [Siemens Semiconductor Group]
Datasheet
1.SAB80C517-M16.pdf
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On-Chip Peripheral Components
Port 5, port 4 and seven lines of port 1 have alternate functions dedicated to the CCU. These
functions are listed in table 7-8. Normally each register controls one dedicated output line at the
ports. Register CC4 is an exception as it can manipulate up to nine output lines (one at port 1.4 and
the other eight at port 5) concurrently. This feature, the "concurrent compare", is described in
section 7.5.5.1.
Note that for an alternate input function the port-bit latch has to be programmed with a ’1’. For bit
latches of port pins that are used as compare outputs, the value to be written to the bit latches
depends on the compare mode established.
A list of all special function registers concerned with the CCU is given in table 7-9.
Figure 7-33
Block Diagram of the CCU
Semiconductor Group
94
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