Datenblatt-pdf.com


DS1305 Schematic ( PDF Datasheet ) - Dallas Semiconducotr

Teilenummer DS1305
Beschreibung Serial Alarm Real Time Clock RTC
Hersteller Dallas Semiconducotr
Logo Dallas Semiconducotr Logo 




Gesamt 22 Seiten
DS1305 Datasheet, Funktion
DS1305
Serial Alarm Real Time Clock (RTC)
www.dalsemi.com
FEATURES
Real time clock counts seconds, minutes,
hours, date of the month, month, day of the
week and year with leap year compensation
valid up to 2100
96-byte nonvolatile RAM for data storage
Two time-of-day alarms programmable on
combination of seconds, minutes, hours and
day of the week
Serial interface supports Motorola serial
peripheral interface (SPI) serial data ports or
standard 3-wire interface
Burst mode for reading/writing successive
addresses in clock/RAM
Dual power supply pins for primary and
backup power supplies
Optional trickle charge output to backup
supply
2.0 - 5.5V operation
Optional industrial temperature range
-40°C to +85°C
Available in space-efficient, 20-pin TSSOP
package
Recognized by Underwriters Laboratory
ORDERING INFORMATION
DS1305
16-Pin DIP
DS1305N
16-Pin DIP (Industrial)
DS1305E
20-Pin TSSOP
DS1305EN 20-Pin TSSOP (Industrial)
PIN ASSIGNMENT
VCC2
VBAT
X1
NC
X2
NC
INT0
NC
INT1
GND
1
2
3
4
5
6
7
8
9
10
20 VCC1
19 NC
18 PF
17 VCCIF
16 SD0
15 SDI
14 SCLK
13 NC
12 CE
11 SERMODE
DS1305 20-Pin TSSOP (173 mil)
VCC2
VBAT
X1
X2
NC
INT0
INT1
GND
1
2
3
4
5
6
7
8
16 VCC1
15 PF
14 VCCIF
13 SDO
12 SDI
11 SCLK
10 CE
9 SERMODE
DS1305 16-Pin DIP (300 mil)
1 of 22
070900






DS1305 Datasheet, Funktion
RTC REGISTERS Figure 3
DS1305
RTC Registers DS1305
HEX ADDRESS Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
READ WRITE
00H 80H 0
10 SEC
SEC
01H 81H 0
10 MIN
MIN
02H 82H 0 12/2 10 10 HR
HOURS
4 P/A
03H 83H 0 0 0
0
DAY
04H 84H 0 0
10 DATE
DATE
05H 85H 0 0 10 MONTH
MONTH
06H 86H
10 YEAR
YEAR
Alarm 0
07H 87H M
10 SEC ALARM
SEC ALARM
08H 88H M
10 MIN ALARM
MIN ALARM
09H 89H M 12/2 10 10 HR
HOUR ALARM
4 P/A
0AH 8AH M 0 0
0
DAY ALARM
Alarm 1
0BH 8BH M
10 SEC ALARM
SEC ALARM
0CH 8CH M
10 MIN ALARM
MIN ALARM
0DH
8DH
M 12/2 10 10 HR
HOUR ALARM
4 P/A
0EH 8EH M 0 0
0
DAY ALARM
0FH 8FH
CONTROL REGISTER
10H 90H
STATUS REGISTER
11H 91H
TRICKLE CHARGER REGISTER
12-1FH 92-9FH
RESERVED
RANGE
00-59
00-59
01-12 + P/A
00-23
01-07
1-31
01-12
00-99
00-59
00-59
01-12 + P/A
00-23
01-07
00-59
00-59
01-12 + P/A
00-23
01-07
Range For Alarm Registers Does Not Include Mask’m’ Bits.
The DS1305 can be run in either 12-hour or 24-hour mode. Bit 6 of the hours register 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 high being PM. In the 24-hour mode, bit 5 is the second 10-hour bit (20-23
hours).
The DS1305 contains two time of day alarms. Time of Day Alarm 0 can be set by writing to registers
87h to 8Ah. Time of Day Alarm 1 can be set by writing to registers 8Bh to 8Eh. The alarms can be
programmed (by the INTCN bit of the Control Register) to operate in two different modes - each alarm
can drive its own separate interrupt output or both alarms can drive a common interrupt output. Bit 7 of
each of the time of day alarm registers are mask bits (Table 1). When all of the mask bits are logic 0, a
time of day alarm will only occur once per week when the values stored in timekeeping registers 00h to
03h match the values stored in the time of day alarm registers. An alarm will be generated every day
when bit 7 of the day alarm register is set to a logic 1. An alarm will be generated every hour when bit 7
of the day and hour alarm registers is set to a logic 1. Similarly, an alarm will be generated every minute
when bit 7 of the day, hour and minute alarm registers is set to a logic 1. When bit 7 of the day, hour,
minute and seconds alarm registers is set to a logic 1, alarm will occur every second.
6 of 22

6 Page









DS1305 pdf, datenblatt
DS1305
NOTE:
CPHA bit polarity (if applicable) may need to be set accordingly. SERIAL CLOCK AS A FUNCTION
OF MICROCONTROLLER CLOCK POLARITY (CPOL) Figure 6
CE
CPOL = 1
SCLK
SHIFT
INTERNAL STROBE
CE
CPOL = 0
SCLK
SHIFT
INTERNAL STROBE
NOTE:
CPOL is a bit that is set in the microcontroller’s Control Register.
ADDRESS AND DATA BYTES
Address and data bytes are shifted MSB first into the serial data input (SDI) and out of the serial data
output (SDO). Any transfer requires the address of the byte to specify a write or read to either a RTC or
RAM location, followed by one or more bytes of data. Data is transferred out of the SDO for a read
operation and into the SDI for a write operation (see Figure 7 and 8).
SPI SINGLE-BYTE WRITE Figure 7
12 of 22

12 Page





SeitenGesamt 22 Seiten
PDF Download[ DS1305 Schematic.PDF ]

Link teilen




Besondere Datenblatt

TeilenummerBeschreibungHersteller
DS1300-3AC-DC / Distributed Power Front-End 2UEmerson
Emerson
DS1302Trickle-Charge Timekeeping ChipMaxim Integrated
Maxim Integrated
DS1302Trickle Charge Timekeeping ChipDallas
Dallas
DS1302Trickle Charge Timekeeping ChipTGS
TGS
DS1305Serial Alarm Real Time Clock RTCDallas Semiconducotr
Dallas Semiconducotr

TeilenummerBeschreibungHersteller
CD40175BC

Hex D-Type Flip-Flop / Quad D-Type Flip-Flop.

Fairchild Semiconductor
Fairchild Semiconductor
KTD1146

EPITAXIAL PLANAR NPN TRANSISTOR.

KEC
KEC


www.Datenblatt-PDF.com       |      2020       |      Kontakt     |      Suche