Rainbow-electronics DS2422 Manual de usuario descargar pdf (Pagina 12)

DS2422

12 of 48

ADDR b7 b6 b5 b4 b3 b2 b1 b0 Function Access*

0228h First Byte Read

— — Access W; —

022Fh Eighth Byte Password

0230h First Byte Full

— — Access W; —

0237h Eighth Byte Password

0238h

— (no function; all of these bytes read 00h) (N/A) R; R

023Fh

Figure 8B. DS2422 Trim Register Page Map

ADDR b7 b6 b5 b4 b3 b2 b1 b0 Function Access*

0400h delay value t

R/W; R

0401h

— (no function; undefined read) (N/A) R; R

0403h

0404h Temperature Counter Reset Low Byte

0405h 0 0 0 Temperature Counter Reset High Byte

R/W; R/W

0406h Temperature Conversion Length Low Byte

0407h 0 0 0 Temperature Conversion Length High Byte

R/W; R/W

0408h

— (no function; undefined read) (N/A) R; R

041Fh

Note: The first entry in column ACCESS TYPE is valid between missions. The second entry shows the applicable

access type while a mission is in progress.

TIMEKEEPING AND CALENDAR

The RTC/alarm and calendar information is accessed by reading/writing the appropriate bytes in the register page,

address 200h to 205h. For readings to be valid, all RTC registers must be read sequentially starting at address

0200h. Some of the RTC bits are set to 0. These bits always read 0 regardless of how they are written. The

number representation of the RTC registers is BCD format (binary-coded decimal).

Real-Time Clock and RTC Alarm Register Bitmap

ADDR b7 b6 b5 b4 b3 b2 b1 b0

0200h 0 10s Single Seconds

0201h 0 10 min. Single Minutes

0202h 0 12/24

20hr

AM/PM

10hr

Single Hours

0203h 0 0 10 Date Single Date

0204h CENT 0 0 10m. Single Months

0205h 10yrs Single Years

The RTC of the DS2422 can run in either 12-hour or 24-hour mode. Bit 6 of the Hours Register (address 202h) is

defined as the 12- or 24-hour mode select bit. When high, the 12-hour mode is selected. In the 12-hour mode, bit 5

is the AM/PM bit with logic 1 being PM. In the 24-hour mode, bit 5 is the 20-hour bit (20 to 23 hours). The CENT bit,

bit 7 of the Months Register, can be written by the user. This bit changes its state when the years counter

transitions from 99 to 00.

The calendar logic is designed to automatically compensate for leap years. For every year value that is either 00 or

a multiple of 4 the device adds a 29

of February. This works correctly up to (but not including) the year 2100.

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 47 48

Comentarios a estos manuales

Sin comentarios

Rainbow-electronics DS2422 Manual de usuario Pagina 12

Comentarios a estos manuales

Relacionado con productos y manuales para Panel De Control Rainbow-electronics DS2422