Rainbow-electronics DS1511 Manual do Utilizador descarregar pdf (Página 19)

DS1501/DS1511 Y2K Watchdog Real-Time Clock

19 of 20

WE only when register 13h is being accessed (Figure 4). The address pointer wraps around after the last address

is accessed.

SELECTOR GUIDE

PART

NOMINAL

SUPPLY (V)

TOP MARK

DS1501YN

5 DS1501YN

DS1501YEN 5 DS1501YEN

DS1501YSN 5 DS1501YSN

DS1501WN 3.3 DS1501WN

DS1501WEN 3.3 DS1501WEN

DS1501WSN 3.3 DS1501WSN

DS1511Y

5 DS1511Y

DS1511W 3.3 DS1511W

PIN CONFIGURATIONS (continued)

720-MIL MODULE

N.C.

DQ0

DQ1

DQ2

GND

SQW

N.C.

DQ7

DQ6

DQ5

DQ4

DQ3

BAUX

N.C.

Dallas

Semiconducto

DS1511

SQW

BAUX

BAT

VCC

GND

DQ6

DQ5

DQ4

DQ3

DQ2

DQ1

DQ0

GND

DQ7

TSOP

Dallas

Semiconductor

DS1501

TOP VIEW

1 2 ... 14 15 16 17 18 19 20

DS1501/DS1511 1
ABSOLUTE MAXIMUM RATINGS 2
CRYSTAL SPECIFICATIONS* 3
AC OPERATING CHARACTERISTICS 3
CAPACITANCE 6
AC TEST CONDITIONS 6
WAKEUP/KICKSTART TIMING 8
PIN DESCRIPTION 9
Figure 8. Block Diagram 10
DETAILED DESCRIPTION 11
DATA READ MODE 11
DATA WRITE MODE 11
KS, PWR, SQW, and RST. If V 12
SETTING THE CLOCK 13
CLOCK ACCURACY 13
POWER-UP DEFAULT STATES 13
USING THE CLOCK ALARM 14
CONTROL REGISTERS 14
Control A Register (0Eh) 15
Clearing IRQ and Flags 15
CLOCK OSCILLATOR CONTROL 16
USING THE WATCHDOG TIMER 16
WAKEUP/KICKSTART 17
SQUARE-WAVE OUTPUT 18
BATTERY MONITOR 18
256 x 8 EXTENDED RAM 18
SELECTOR GUIDE 19

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