MCP795W20T Ver la hoja de datos (PDF) - Microchip Technology

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MCP795W20T

2Kb EE 64B SRAM WD TED ID

Microchip Technology 

MCP795W1X/MCP795W2X

4.0 RTCC FUNCTIONALITY

4.0.1 RTCC REGISTER MAP

The RTCC register space runs from 0x00 through to

0x1F. Any read or write that is started within the RTCC

register address space will wrap to the beginning of

the RTCC registers.

All of the RTCC registers are backed up from the VBAT

supply when VCC is not available, provided that the

VBATEN bit is set. Any unused bits or non imple-

mented addresses read back as ‘0’. No error checking

is provided for any of the RTCC, the user may load

any value.

The RTCC register map is shown in Table 4-1.

TABLE 4-1: RTCC REGISTER MAP

Address

BIT 7

BIT 6

BIT 5

00h

Tenth Seconds

BIT 4

BIT 3

BIT 2

BIT 1

Time and Configuration Registers

Hundredths of Seconds

BIT 0

01h

ST (CT)

10 Seconds

Seconds

02h

10 Minutes

Minutes

03h

CALSGN

10 Hour

10 Hour

12/24

AM/PM

Hour

04h

OSCON

VBAT

VBATEN

Day

05h

10 Date

Date

06h

LP

10 Month

Month

07h

10 Year

Year

08h

OUT

SQWE

ALM1

ALM0

EXTOSC RS2

RS1

RS0

09h

CALIBRATION

0Ah

WDTEN WDTIF

WDDEL

WDTPLS WD3

WD2

WD1

WD0

0Bh

EVHIF EVLIF

EVEN1

EVEN0

EVWDT EVLDB EVHS1 EVHS0

Alarm 0 Registers

0Ch

10 Seconds

Seconds

0Dh

10 Minutes

Minutes

0Eh

10 Hour

10 Hours

12/24

AM/PM

Hour

0Fh

ALM0PIN

ALM0C2

ALM0C1

ALM0C0

ALM0IF

Day

10h

10 Date

Date

11h

10 Month

Month

Alarm 1 Registers

12h

Tenth Seconds

Hundredths of seconds

13h

10 Seconds

Seconds

14h

10 Minutes

Minutes

15h

10 Hour

10 Hours

12/24

AM/PM

Hour

16h

ALM1PIN

ALM1C2

ALM1C1

ALM1C0

ALM1IF

Day

17h

10 Date

Date

Power-Down Time-Stamp Registers

18h

10 Minutes

Minutes

19h

10 Hour

10 Hours

12/24

AM/PM

Hour

1Ah

10 Date

Date

1Bh

Day

10 Month

Month

Power-Up Time-Stamp Registers

1Ch

10 Minutes

Minutes

1Dh

10 Hour

10 Hours

12/24

AM/PM

Hour

1Eh

10 Date

Date

1Fh

Day

10 Month

Month

FUNCTION

Hundredths of

seconds

Seconds

Minutes

Hours

Day

Date

Month

Year

Control Reg.

Calibration

Watchdog

Event Detect

Seconds

Minutes

Hours

Day

Date

Month

Hundredths

of Seconds

Seconds

Minutes

Hours

Day

Date

RANGE

00-99

00-59

00-59

1-12 + AM/PM

00 - 23

1-7

01-31

01-12

00-99

00-59

00-59

1-12 + AM/PM

00-23

1-7

01-31

01-12

00-99

00-59

00-59

1-12 + AM/PM

00-23

1-7

01-31

 2011-2012 Microchip Technology Inc.

Preliminary

DS22280C-page 11

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