Dallas Semiconductor DS17287-5 DIP(24) Device

Adapters for Automated Programmers

Adapters for Manual Programmers

Adapters for Engineering Programmers

Last Updated: 05/18/2023

IMPORTANT: Real Time Clock.Definition of the address map:[000h-07Fh] is BANK0;[080h-0FFh] is BANK1 (only four bytes 0C8h-0CBh are programmable);[100h-8FFh] is 2K-Byte EXTENDED RAM.The first 14 bytes contain the RTC time calendar alarm data andfour registers.This device may generate errors at BANK0 (first 14 addresses)and in BANK1 (first 14 addresses and RTC WRITE COUNTER)when compared. The reason for this is that the clock circuit may berunning after the part is programmed.Before programming the first 14 bytes the SET bit in Register B is automaticallywritten to a logic one to prevent updates from occurring while access is beingattempted. During programming the first 14 bytes the SET bit in Register B isprogrammed with the data in buffer.The RCE bit (bit 4) in EXTENDED CONTROL REG 4B (0CBh) must be set to zeroor the 114 bytes of user RAM may be cleared during power down.For detailed information please refer to Dallas Semiconductor data books.