SSC050-01 Datasheet, PDF (14/79 Pages) Maxim Integrated Products – Two-Wire Serial Backplane Controller

Pin Description
Pin Description List
SSC050-01
Data Sheet
PIN DESCRIPTION LIST
The following pin descriptions are grouped by function.
Table 3-1: Serial Interface
Pin Names
A2-A0
ASEL
SCL
SDA
Pin No.
9-7
12
13
14
Type
Inputs
Input
Input
Bidirectional
Pin Description
Address Select Bus
This pin group provides the value, which will be compared to bits
3 through 1 of the serial slave address. These pins should be
strapped to VDD or VSS to provide the appropriate binary value.
Device Type Address Select
This pin provides the ability to select between two-device type
address values in the serial slave address. When tied to VSS,
the device type address is 1000b and when tied to VDD, the
device type address is 1100b.
Two-wire Serial Interface Clock
This pin is used by the device to latch the data present on the
SDA pin. This pin in conjunction with the SDA pin also deter-
mines Start and Stop conditions on the serial bus.
Two-wire Serial Interface Data
This pin is used to transfer all serial data into and out of the
device. This pin in conjunction with the SCL pin also determines
Start and Stop conditions on the serial bus.
Table 3-2: Clock
Pin Names
OSCI
Pin No.
11
Type
Input
OSCO
10
Output
Pin Description
Oscillator Input
This pin is connected to one side of an external 10.0MHz crystal
to produce the clock required for serial signal filtering, state
machine clocking and flash rate generation. An alternate exter-
nal 3.3 volt 10.0MHz clock source can be connected to this pin.
Oscillator Output
This pin is connected to the other side of an external 10.0MHz
crystal. When an alternate external clock source is used, this pin
should be left unconnected.
Table 3-3: Interrupt
Pin Names
INT#
Pin No.
15
Type
Open-Drain
Output
Pin Description
Interrupt
This open-drain output can be used to signal the microcontroller
that an event has occurred on an I/O pin which is configured as
an input or that a special function event has occurred. This pin
can be wire ORed with other open drain outputs to provide a sin-
gle interrupt input source.
3-3
Revision 4.0
November 10, 2004