ICS1531 Data Sheet - Preliminary
Chapter 2 Summary
2.9 Industry-Standard 2-Wire Serial Interface
To access all its registers, the ICS1531 uses an industry-standard 2-wire serial interface that operates at
one of the following speeds:
• A low speed of 100 kHz
• A high speed of 400 kHz
• An ultra speed of 800 kHz
For use with the 2-wire serial interface, the ICS1531 has 5 V-tolerant inputs. The ICS1531 can use either
of two unique, alternative sets of addresses. Table 2-2 lists the addresses that can be used, depending on
the state of the SBADR pin.
Table 2-2. ICS1531 Address Sets
Addresses in
Address Set
Address Set 1.
(SBADR Pin Is Low)
Address Set 2.
(SBADR Pin Is High)
7-bit device address
8-bit read address
8-bit write address
24h
49h
48h
25h
4Bh
4Ah
2.10 Programmable Outputs
For general-purpose outputs, the ICS1531 provides three programmable pins, PSEL3, PSEL2, PSEL1
(Reg 37:2-0).
ICS1531 Rev N 12/1/99
December, 1999
Copyright © 1999, Integrated Circuit Systems, Inc.
All rights reserved.
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ICSI [ INTEGRATED CIRCUIT SOLUTION INC ]
