XIB-E【PDF 7/64 页】BOARD INTERFACE ETHERNET

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XStream"燨EM燫F燤odule?燩roduct燤anual爒5.x00燵2006.02.24]?/DIV>

1.5. Electrical Characteristics

Figure?03. System燘lock燚iagram?/DIV>

Basic爓ireless爈ink燽etween爃osts?/DIV>

The data flow sequence is initiated when the first byte of data is received in the DI Buffer of the

transmitting module (XStream Module A). As long as XStream Module A is not already receiving

RF data, data in the DI Buffer is packetized, then transmitted over-the-air to XStream Module B-0

1.5.1. Timing Specifications

Figure?04. Timing燬pecifications?A燼nd?B爎efer爐o燜igure?03.)牋

Table?04. AC燙haracteristics?SY爌arameter??,爏ymbols燾orrespond爐o燜igure?03燼nd燜igure?04.)?/DIV>

Symbol

Description

19200 baud rate

(32 byte packet)

19200 timing

(B=number of bytes)

9600 baud rate

(32 byte packet)

9600 timing

(B=number of bytes)

Latency from the time data is

transmitted until received

54.0 ms

For 0 < B < 64,

T = 41.6 + (0.4 * B) ms

For B > 63,

T = 66.8 ms

72.0 ms

For 0 < B < 40,

T = 46.27 + (0.73 * B) ms

For B >= 39 bytes,

T = 74.80 ms

TTL

Time that

/PWR pin is

driven low

8.4 ms

For 0 < B < 14,

T = 3.24 + (0.4 * B) ms

For B > 13,

T = 8.48 ms

16.8 ms

For 0 < B < 14,

T = 6.50 + (0.8 * B) ms

For B > 13,

T = 16.80 ms

TRL

Time that RX LED pin is

driven high

13.6 ms

For 0 < B < 65,

T = 0.79 + (0.408 * B)

For B > 64,

T = 26.9 ms

25.6 ms

For 0 < B < 37,

T = 1.63 + (0.794 * B)

For B > 36,

T = 30.2 ms

TST

Channel Initialization Time

35.0 ms

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