HFC-U Cologne Chip AG, HFC-U Datasheet - Page 6

• Manufacturer Part Number: HFC-U
• Description: Isdn HDLC Basic Rate Controller
• Manufacturer: Cologne Chip AG

1.2.2 Processor interface modes
The processor modes are selected by IIOSEL3-0 = '0000' (see also 3.2).
Mode 2:
Mode 3:
Mode 4:
The lines SA0-SA7 are used for direct addressing the internal registers of the HFC-U.
March 1997
Siemens/Intel bus with seperated address bus and databus and control signals /CS,
/WR, /RD is selected by setting ALE to GND.
Intel bus with multiplexed address and databus with control signals /CS, /WR, /RD,
ALE.
ALE latches the address. The addresslines SA0-SA7 must be connected to the
datalines BD0-BD7.
Motorola bus with control signals /CS, R/W, /DS is selected by setting ALE to VDD.
HFC-U
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