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OVERVIEW

The block diagram in Figure 1 shows the relationships between the major control and memory sections of the DS1996. The DS1996 has three main data components: 1) 64-bit lasered ROM, 2) 256-bit scratchpad and 3) 65536-bit SRAM. The hierarchial structure of the 1-Wire protocol is shown in Figure 2. The bus master must first provide one of the six ROM Function Commands, 1)Read ROM, 2) Match ROM, 3) Search ROM, 4) Skip ROM, 5) Overdrive-Skip ROM or Overdrive-Match ROM.

SPECIAL FEATURES

65536 bits of read/write nonvolatile memory

Overdrive mode boosts communication speed to 142k bits per second

256-bit scratchpad ensures integrity of data transfer

Memory partitioned into 256-bit pages for packetizing data

Data integrity assured with strict read/write protocols

Operating temperature range from -40°C to +70°C

Over 10 years of data retention