Rainbow-electronics DS1722 Manual do Utilizador descarregar pdf (Página 11)

DS1722

11 of 13

TIMING DIAGRAM: 3-WIRE WRITE DATA TRANSFER Figure 10

*I/O is SDI and SDO tied together.

AC ELECTRICAL CHARACTERISTICS: SPI Interface

(-55°

°°

°C to +120°

°°

°C, 2.65V ≤

≤≤

≤=

≤

≤≤

≤=

=5.5V)

PARAMETER SYMBOL CONDITION MIN TYP MAX UNITS NOTES

Data to SCLK Setup t

35 ns 5, 6

SCLK to Data Hold t

CDH

35 ns 5, 6

SCLK to Data Valid t

CDD

80 ns 5, 6, 7

SCLK Low Time t

100 ns 6

SCLK High Time t

100 ns 6

SCLK Frequency t

CLK

DC 5.0 MHz 6

SCLK Rise and Fall t

, t

200 ns

CE to SCLK Setup t

400 ns 6

SCLK to CE Hold t

CCH

100 ns 6

CE Inactive Time t

CWH

400 ns 6

CE to Output High Z t

CDZ

40 ns 5, 6

TIMING DIAGRAM: SPI READ DATA TRANSFER Figure 11

1 2 ... 6 7 8 9 10 11 12 13

Digital Thermometer with 1
SPI/3-Wire Interface 1
OVERVIEW 2
OPERATION-Programming 4
SERIAL INTERFACE 5
FUNCTION TABLE Table 5 6
POLARITY (CPOL) Figure 3 6
ADDRESS AND DATA BYTES 7
3-WIRE SERIAL DATA BUS 8
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