Rainbow-electronics DS1306 Manual do Utilizador descarregar pdf (Página 19)

DS1306

19 of 21

SPI AC ELECTRICAL CHARACTERISTICS (Over the operating range*)

PARAMETER SYMBOL MIN TYP MAX UNITS NOTES

= 2.0V 200

Data to CLK Setup t

= 5V 50

ns 3, 4

= 2.0V 280

CLK to Data Hold t

CDH

= 5V 70

ns 3, 4

= 2.0V 800

CLK to Data Delay t

CDD

= 5V 200

ns 3, 4, 5

= 2.0V 1000

CLK Low Time t

= 5V 250

ns 4

= 2.0V 1000

CLK High Time t

= 5V 250

ns 4

= 2.0V 0.6

CLK Frequency t

CLK

= 5V DC 2.0

MHz 4

= 2.0V 2000

CLK Rise and Fall t

, t

= 5V 500

= 2.0V 4

CE to CLK Setup t

= 5V 1

= 2.0V 240

CLK to CE Hold t

CCH

= 5V 60

ns 4

= 2.0V 4

CE Inactive Time t

CWH

= 5V 1

= 2.0V 280

CE to Output High-Z t

CDZ

= 5V 70

ns 3,4

*Unless otherwise noted.

1 2 ... 14 15 16 17 18 19 20 21

Serial Alarm Real-Time Clock 1
PIN DESCRIPTION 2
DESCRIPTION 2
OPERATION 3
Figure 1. BLOCK DIAGRAM 3
SIGNAL DESCRIPTIONS 3
CLOCK ACCURACY 5
CLOCK, CALENDAR, AND ALARM 5
SPECIAL PURPOSE REGISTERS 7
STATUS REGISTER (READ 10H) 7
POWER CONTROL 9
10 of 21 10
SERIAL INTERFACE 11
CLOCK POLARITY (CPOL) 12
ADDRESS AND DATA BYTES 12
13 of 21 13
3-WIRE INTERFACE 14
ABSOLUTE MAXIMUM RATINGS* 15
OPERATING RANGE 15
= +25°C) 16
17 of 21 17
18 of 21 18
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