Pni MS2100 User Manual download pdf (Page 7)

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21-Jan-11 Page 7 of 16-

MS2100

Specifications & Instructions

Hardware Handshaking Line Descriptions

RESET

RESET is usually low. RESET must be toggled from low-high-low.

DRDY - Data Ready

DRDY is low after a RESET; after a command has been received and the data is ready, DRDY

will be high. It is recommended that the DRDY line always be used to ensure that the data is

clocked out of the MS2100 only when it is available. If it is determined that the DRDY line can-

not be used due to lack of I/O lines to the host processor, then the times listed in Table 6 can be

used to set open-loop wait times. The values listed are the maximum delays from the end of the

SCLK command until the rise of the DRDY at each period select setting. The maximum delay

occurs when the sensor being sampled is in a zero field.

Table 6: Typical Delay for DRDY

Period Select

Typical Delay (msec)

/32

0.32

/64

0.53

/128

0.96

/256

1.8

/512

3.5

/1024

6.9

/2048

13.8

/4096

27.4

a. Calculated from (1/sensor frequency x (period

select) x 2 [Forward & reverse measurement]

1 2 3 4 5 6 7 8 9 10 11 12 ... 15 16

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Pni MS2100 User Manual Page 7