peb20560 Infineon Technologies Corporation, peb20560 Datasheet - Page 174

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

Semiconductor Group
2.12.3.3
Address: 362
µP interface mode: read/write
Reset Value: 00
Note: Bits 7…6 are unused, and are read as ‘0’.
This register fulfils the following functions:
• REFCLK IO control.
• VCO frequency selection.
• Reference clock source selection.
• Reference clock dividor selection.
RCD1…0
VCXOF
RCS1…0
RCDIR
Note: The first write access to the DOC (after Reset) should not be addressed to
bit 7
0
CCSEL2 register.
Clocks Select 2 Register (CCSEL2)
H
Reference Clock Divider
00: No division of reference clock
01: Forbidden
10: Divide reference clock by 3
11: Divide reference clock by 4
Voltage Control Oscillator Frequency
0:
1:
Reference Clock Source
00: Select internal 512 KHz as reference clock
01: Select REFCLK as reference clock
10: Select XCLK as reference clock
11: Select internal 8 KHz clock as reference clock
REFCLK direction
0:
1:
0
H
Select 512 KHz clock
Select 8 KHz clock
REFCLK is input
REFCLK is output
RCD1
RCD0
2-128
VCXOF
Functional Block Description
RCS1
RCS0
PEB 20560
bit 0
RCDIR
2003-08