SSC050-01 Datasheet, PDF (74/79 Pages) Maxim Integrated Products – Two-Wire Serial Backplane Controller

Electrical Characteristics
AC Characteristics
SSC050-01
Data Sheet
Two-wire Serial Interface Operation
The following diagrams illustrate the two-wire serial interface read and write capabilities of the
SSC050-01. All operations can be performed in any order.
S
T
SLAVE
A ^ADDRESS
R
T
MULTI-BYTE
WRITE
S
A
S
E
L
WORD
ADDRESS (n)
A
A
C
C
K
K
DATA n
DATA n+1
S
DATA n+x
T
O
P
P
A
A
A
C
C
C
K
K
K
S
T
SLAVE
A ^ADDRESS
WORD
ADDRESS
S
DATA
T
R
O
T
P
BYTE
WRITE
S
P
A
A
A
A
S
C
C
C
E
K
K
K
L
S
T
SLAVE
A ^ADDRESS
WORD
ADDRESS (n)
S
T
SLAVE
A ^ADDRESS
DATA n
DATA n+1
DATA n+x
S
T
R
R
O
T
T
P
MULTI-BYTE
READ
S
S
P
A
A
AA
A
A
A
S
C
CS
C
C
C
E
K
KE
K
K
K
L
L
S
T
SLAVE
A ^ADDRESS
WORD
ADDRESS (n)
S
T
SLAVE
A ^ADDRESS
DATA n
S
T
R
R
O
T
T
P
BYTE
READ
S
S
P
A
A
AA
A
S
C
CS
C
E
K
KE
K
L
L
Figure 5-3. Two-Wire Serial Interface Operation
Oscillator Requirements
The SSC050-01 can use an external 3.3 volt 8.0MHz to 12.5MHz clock source connected to the OSCI
pin with CKSEL2 tied to VSS. An external 3.3 volt 32.0MHz to 50.0MHz clock source can be
connected to the OSCI pin with CKSEL2 tied to VDD and CKSEL1 tied to VSS. An external 3.3 volt
48.0MHz to 75.0MHz clock source can be connected to the OSCI pin with CKSEL2 tied to VDD and
CKSEL1 tied to VDD. Alternatively, an 8.0MHz to 12.5MHz crystal and several passive components
5-7
Revision 4.0
November 10, 2004