FN6667 datasheet(24/34 Pages) RENESAS

24 / 34 page

ISL12020M

FN6667 Rev 6.00

Page 24 of 34

January 9, 2015

• Bits 0, 1, 2 contain the Day of the week information, which

sets the Day of the Week that DST starts. Note that Day of the

week counts from 0 to 6, like the RTC registers. The default for

the DST Forward Day of the Week is 00h (normally Sunday).

• Bits 3, 4, 5 contain the Week of the Month information that

sets the week that DST starts. The range is from 1 to 5 and

Week 7 is used to indicate the last week of the month. The

default for the DST Forward Week of the Month is 00h.

DST Date Forward

DstDtfd controls which Date DST begins. The format for the Date

is the same as for the RTC register, from 1 to 31. The default

value for DST forward date is 00h. DstDtFd is only effective if

DstDwFdE = 0.

DST Hour Forward

DstHrFd controls the hour that DST begins. The RTC hour and

DstHrFd registers have the same formats except there is no

Military bit for DST hour. The user sets the DST hour with the

same format as used for the RTC hour (AM/PM or MIL) but

without the MIL bit and the DST will still advance as if the MIL bit

were there. The default value for DST hour Forward is 00h.

DST REVERSE REGISTERS (24H TO 27H)

DST end (reverse) is controlled by the following DST Registers:

DST Month Reverse

DstMoRv sets the Month that DST ends. The format is the same

as for the RTC register month, from 1 to 12. The default value for

the DST end month is October (10h).

DST Day/Week Reverse

DstDwRv contains both the Day of the Week and the Week of the

Month data for DST Reverse control. DST can be controlled either

by actual date or by setting both the Week of the month and the

Day of the Week. DstDwRvE sets the priority of the Day/Week

over the Date. For DstDwRvE = 1, Day/Week is the priority. You

must have the correct Day of Week entered in the RTC registers

for the Day/Week correction to work properly.

• Bits 0, 1, 2 contain the Day of the week information, which

sets the Day of the Week that DST ends. Note that Day of the

week counts from 0 to 6, like the RTC registers. The default for

the DST Reverse Day of the Week is 00h (normally Sunday).

• Bits 3, 4, 5 contain the Week of the Month information that sets

the week that DST ends. The range is from 1 to 5 and Week 7 is

used to indicate the last week of the month. The default for the

DST Reverse Week of the Month is 00h.

DST Date Reverse

DstDtRv controls which Date DST ends. The format for the Date is

the same as for the RTC register, from 1 to 31. The default value

for DST Date Reverse is 00h. The DstDtRv is only effective if the

DwRvE = 0.

DST Hour Reverse

DstHrRv controls the hour that DST ends. The RTC hour and

DstHrFd registers have the same formats except there is no

Military bit for DST hour. The user sets the DST hour with the

same format as used for the RTC hour (AM/PM or MIL) but

without the MIL bit and the DST will still advance as if the MIL bit

were there. The default value for DST hour Reverse is 00h.

TEMP Registers (TEMP)

The temperature sensor produces an analog voltage output,

which is input to an A/D converter and produces a 10-bit

temperature value in degrees Kelvin. TK07:00 are the LSBs of the

code and TK09:08 are the MSBs of the code. The temperature

result is actually the average of two successive temperature

measurements to produce greater resolution for the temperature

control. The output code can be converted to degrees Centigrade

by first converting from binary to decimal, dividing by 2 and then

subtracting 273d.

TABLE 23. DST FORWARD REGISTERS

ADDRESS

FUNCTION

54321

20h

Month Forward

DSTE

MoFd20

MoFd13

MoFd12

MoFd11

MoFd10

21h

Day Forward

DwFdE

WkFd12

WkFd11

WkFd10

DwFd12

DwFd11

DwFd10

22h

Date Forward

DtFd21

DtFd20

DtFd13

DtFd12

DtFd11

DtFd10

23h

Hour Forward

HrFd21

HrFd20

HrFd13

HrFd12

HrFd11

HrFd10

TABLE 24. DST REVERSE REGISTERS

ADDRESS

NAME

432

24h

Month Reverse

MoRv20

MoRv13

MoRv12

MoRv11

MoRv10

25h

Day Reverse

DwRvE

WkRv12

WkRv11

WkRv10

DwRv12

DwRv11

DwRv10

26h

Date Reverse

DtRv21

DtRv20

DtRv13

DtRv12

DtRv11

DtRv10

27h

Hour Reverse

HrRv21

HrRv20

HrRv13

HrRv12

HrRv11

HrRv10

Temperature in °C

[(TK <9:0>)/2] - 273

(EQ. 4)

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