XE8000EV101 Semtech, XE8000EV101 Datasheet - Page 85

• Manufacturer Part Number: XE8000EV101
• Description: EVAL BOARD FOR XE8801AMI027LF
• Manufacturer: Semtech
• Type: MCUr

Specifications of XE8000EV101

• Contents: Fully Assembled Evaluation Board
• For Use With/related Products: XE88LC01AMI027
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

When UsrtEnWaitCond1 is 1, the S0 signal will be stretched in its low state after its falling edge if the condition 1
has been detected before (UsrtCond1=1). UsrtWaitS0 is then set to 1, indicating that the S0 line is forced low.
One can release S0 by writing to the RegUsrtBufferS1 register.
Figure 15-5 shows the sampling function implemented by the UsrtBufferS1 bit. The bit UsrtBufferS1 in
RegUsrtBufferS1 is the value of S1 sampled on PB[4] at the last rising edge of S0. The bit UsrtEdgeS0 in
RegUsrtEdgeS0 is set to one on the same S0 rising edge and is cleared by a read operation of the
RegUsrtBufferS1 register. The bit therefor indicates that a new value is present in the RegUsrtBufferS1 which
was not yet read.
© Semtech 2005
S1
S0
UsrtBufferS1
read Reg UsrtBufferS1
UsrtEdgeS0
Figure 15-5: S1 sampling
15-6
XE8801A – SX8801R
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