peb20560 Infineon Technologies Corporation, peb20560 Datasheet - Page 235

• Manufacturer Part Number: peb20560
• Description: Dsp Oriented Pbx Controller Doc
• Manufacturer: Infineon Technologies Corporation

PEB 20560
Operational Description
The CCR1 is the final minimum register that has to be programmed to initialize the
SIDEC. In addition to defining the serial port configuration, the CCR1 defines the
characteristic of all IOM-2 ports allows the CPU to power-up or power-down a SIDEC.
In power-down mode all internal clocks are disabled, and no interrupts are forwarded to
the CPU. This state can be used as standby mode for reduced power consumption.
Switching between power-up or power-down mode has no effect on the contents of the
register, i.e. the internal state remains stored.
After power-up of the SIDEC, the CPU should bring the transmitter and receiver to a
defined state by issuing a XRES (transmitter reset) and RHR (receiver reset) command
via the CMDR-register. The SIDEC will then be ready to transmit and receive data.
The CPU controls the data transfer phase mainly by commands to the SIDEC via the
CMDR-register, and by interrupt indications from the SIDEC to the CPU. Status
information that does not trigger an interrupt is constantly available in the STAR-register.
Semiconductor Group
3-29
2003-08