CobraNet Hardware User’s Manual
Pinout and Signal Descriptions
4.2.5 Miscellaneous Signals
CM-2
Pin #
CS1810xx/
CS4961xx Pin #
Signal
Description Direction
Notes
System reset (active low).
HRESET
Reset
In
J1:A18
93
95
92
10 ns max rise time. 1 ms min assertion time.
Toggles at 750 Hz nominal rate to indicate proper
operation. Period duration in excess of 200 ms
indicates hardware or software failure has occurred
and the interface should be reset. Note that
improper operation can also be indicated by short
pulses (<100 ns).
WATCHDOG
Watch Dog
Out
J3:A17
Interface
Ready
Asserts (active low) during initialization and when a
fault is detected or connection to the network is lost.
MUTE
NC
Out
-
J3:A2
-
28, 50-53, 78-
81, 141, 142
No Connect
4.2.6 Power and Ground Signals
CS1810xx/CS4961xx
Signal
Description
CM-2 Pin #
Specification
Pin #
J1:B20, B17, B15,
B13, B11, B9, B7,
B5, B3
System Digital +3.3 v
N/A
VCC_+3V
3.3 0.3v, 500 mA Typ., 750 mA Max.
J3:B14, B12, B10,
B8, B6, B4, B2
J3;B[18:17]
N/A
N/A
Backwards Compatibility
VCC_+5V
10, 24, 54, 66, 83,
98, 119, 130
VDDD
+1.8 V @ 500mA Typ. for Core Logic
18, 33, 44, 60, 73,
91, 113, 136
VDDIO
VDDA
N/A
N/A
+3.3 V @ 120mA Typ. for I/O Logic
Filtered +1.8 V @ 10mA Typ.
129
N/A
AUX_POWER
[3-0]
J3:B[20:19],
A[20:19]
J1:B19, B16, B14,
B12, B10, B8, B6,
B4, B2
13, 21, 27, 36, 47,
57, 63, 69, 76, 86,
94, 101, 116, 122,
126, 133, 139
GND
Digital Ground
J3:B16, B15, B13,
B11, B9, B7, B5,
B3, B1
14
©Copyright 2005 Cirrus Logic, Inc.
DS651UM23
Version 2.3
CIRRUS [ CIRRUS LOGIC ]
