SSC050-01 Datasheet, PDF (15/79 Pages) Maxim Integrated Products – Two-Wire Serial Backplane Controller

Pin Description
Pin Description List
SSC050-01
Data Sheet
Table 3-4: I/O Ports
Pin Names
P0.7-P0.0
Pin No.
57-64
Type
Bidirectional
P1.7-P1.0
46-49,
53-56
Bidirectional
P2.7-P2.0
(Tach Inputs
and PWM out-
puts)
38-45
Bidirectional
P3.7-P3.0
(Bypass I/O)
27-31,
35-37
Bidirectional
P4.7-P4.0
(Bypass I/O)
16, 17,
21-26
Bidirectional
Pin Description
I/O Port 0
Port 0 is a dedicated eight-bit bidirectional I/O port. The user
can select between an input, totem pole output or open-drain
output. Additional capability to detect input edge changes and
select various output flashing rates is also available.
I/O Port 1
Port 1 is a dedicated eight-bit bidirectional I/O port. The user
can select between an input, totem pole output or open-drain
output. Additional capability to detect input edge changes and
select various output flashing rates is also available.
I/O Port 2
Port 2 is an eight-bit bidirectional I/O port. The user can select
between an input, totem pole output or open-drain output. Addi-
tional capability to detect input edge changes and select various
output flashing rates is also available. Through control register
setup, P2.7-P2.4 can be dedicated to monitoring fans equipped
with tachometer outputs. Through control register setup, P2.3-
P2.0 can be dedicated to controlling fan speed utilizing pulse
width modulated outputs.
I/O Port 3
Port 3 is a shared eight bit bidirectional I/O port which can be
used as a general purpose I/O port or as Port Bypass control.
The user can select between an input, totem pole output or
open-drain output. Additional capability to detect input edge
changes and select various output flashing rates is also availa-
ble. Through control register setup, four two-bit portions of this
port can be dedicated to the control of a combination of PBC/
CRU/SDU functions. Any combination of port bypass control
functions can be enabled with the remaining I/O pins used for
general purpose functions.
I/O Port 4
Port 4 is a shared eight bit bidirectional I/O port which can be
used as a general purpose I/O port or as Port Bypass control.
The user can select between an input, totem pole output or
open-drain output. Additional capability to detect input edge
changes and select various output flashing rates is also availa-
ble. Through control register setup, four two-bit portions of this
port can be dedicated to the control of a combination of PBC/
CRU/SDU functions. Any combination of port bypass control
functions can be enabled with the remaining I/O pins used for
general purpose functions.
Table 3-5: Test
Pin Names
TEST2-
TEST0
Pin No.
6-4
Type
Input
Revision 4.0
November 10, 2004
Pin Description
Functional Test
These inputs allow the device to be placed in specific test
modes for device level testing. These inputs should be con-
nected to VSS for normal operation.
3-4