HFC-4S Cologne Chip AG, HFC-4S Datasheet - Page 42

• Manufacturer Part Number: HFC-4S
• Description: Isdn HDLC Fifo Controller With 8 (4) Integrated S/t Interfaces
• Manufacturer: Cologne Chip AG

HFC-4S
HFC-8S
Legend:
Unused input pins should be tied to ground. Unused I/O pins should be tied via a 1 M resistor to
ground.
42 of 273
205
206
207
208
Pin
Interface
PCI
ISA PnP
PCMCIA
Processor
SPI
PCI
ISA PnP
PCMCIA
Processor
SPI
G
FL0 and VDD pins might be driven as chip output during power-on. To prevent
a short circuit these pins must either be connected via a resistor (e.g. 1 M ) to
ground resp. power supply or they can directly be tied to ground resp. power
supply, if RESET is always active during power-on.
O
IO
Ood
IOpu
NC
R_A7
FL0
VDD
I
Important !
Input pin
Output pin
Bidirectional pin
Not connected
Not connected, should be tied to ground if the pin is not used as GPI
function
Fixed level (low), must be connected to ground via external pull-down
(e.g. 1 M )
Fixed level (high), must be connected to power supply via external
external pull-up (e.g. 1 M )
Output pin with open drain
Bidirectional pin with internal pull-up resistor of app. 100 k to VDD
Name
AD29
SA13
FL0
AD28
SA12
FL0
GND
VDD
A13
FL0
A12
FL0
Universal external bus interface
I/O
IO
IO
I
I
I
I
I
I
I
I
Description
Address / Data bit 29
Address bit 13
Fixed level (low), connect to
ground via ext. pull-down
Fixed level (low), connect to
ground via ext. pull-down
Address / Data bit 28
Address bit 12
Fixed level (low), connect to
ground via ext. pull-down
Fixed level (low), connect to
ground via ext. pull-down
Ground
+3.3 V power supply
Address bit 13
Address bit 12
Data Sheet
(continued from previous page)
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
March 2003 (rev. A)
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Cologne
Chip
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8
8
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