HFC-SP Cologne Chip AG, HFC-SP Datasheet - Page 8

• Manufacturer Part Number: HFC-SP
• Description: Isdn S/t HDLC Basic Rate Controller
• Manufacturer: Cologne Chip AG

863 C@
1.2
The HFC-SP has 6 different bus modes, which can be selected by the lines MODE, ALE and IIOSEL0-
IIOSEL3. Depending on the selected mode the function of several pins is different (see: Pin description).
Table 1: Mode selection
1.2.1 ISA-PC mode
Mode 1:
In mode 1 the HFC-SP is addressed by two successive port addresses on the ISA-PC bus. The port
address is selected by the lines SA0 - SA9.
The address with SA0='1' is for register selection and the address with SA0='0' is used for data read/write
(see also: 3.1).
1.2.2 ISA Plug and Play mode
Mode 5:
In mode 5 the HFC-SP is addressed by two successive port addresses on the ISA-PC bus. The port
address is selected by the lines SA0 - SA11.
The address with SA0='1' is for register selection and the address with SA0='0' is used for data read/write
(see also: 3.2).
( _V (#
MODE
GND
VDD
NC
NC
NC
NC
Mode description
NC = not connected (leave pin open)
*)
IIOSEL0: EE_SCL Clock of external EEPROM
IIOSEL1: EE_SDA Serial data of external EEPROM
IIOSEL2: SA10
IIOSEL3: SA11
ALE = GND, IIOSEL3-0
ISA Plug and Play mode is selected by: ALE = GND and MODE = GND
GND
VDD
GND
pulse
GND
GND
ALE
IIOSEL0..3
ISA-bus address bit 10
ISA-bus address bit 11
all 0
all 0
all 0
*)
*)
0
0000, MODE = NC
ISA-PC mode (mode 1)
processor mode (mode 2)
processor mode (mode 3)
processor mode (mode 4)
ISA Plug and Play mode (mode 5)
PCMCIA mode (mode 6)
Selected mode
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Cologne
Chip