DS1616

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MEMORY

The memory map in Figure 2a shows the general organization of the DS1616. As can be seen in the

figure, the device is segmented into 32-byte pages. Pages 0 and 1 contain the Real Time Clock and

Control registers (see Figure 2b for more detail). The User NV RAM resides in page 2. Pages 17 to 19

are assigned to storing the alarm time stamps and durations and pages 64 to 71 are reserved for histogram

memory. The data logging memory covers pages 128 to 191. Memory pages 3 to 16, 20 to 63, 68 to 127,

and 192 and up are reserved for future extensions.

The end user can write only to the Real Time Clock and Control registers and the User NV RAM. The

rest of the memory map is read-only from the end user’s perspective.

DS1616 MEMORY MAP Figure 2a

0000H

to 003FH

RTC and Control Registers

pages 0 and 1

0040H

to 0005FH

User NV RAM

page 2

0060H

to 0217H

(Reserved for Future Extensions)

page 3

to page 16

(excluding last

8 bytes of

page 16)

0218H

to 021FH

Serial Number

page 16

(last 8 bytes)

00220H

to 027FH

Alarm Time Stamps and Durations

page 17

to page 19

0280H

to 07FFH

(Reserved for Future Extensions)

page 20 - 63

0800H

to 087FH

Temperature Histogram (63 Bins of 2 Bytes Each)

page 64

to page 67

0880H

to 08FFH

ADC Channel 1 Data Histogram (64 Bins of 2 Bytes Each)

page 68

to page 71

0900H

to 0FFFH

(Reserved for Future Extensions)

page 72 - 127

1000H

to 17FFH

Datalog Memory (64 pages)

page 128

to page 191

1800H

and higher

(Reserved for Future Extensions)

page 192 and

higher