XE8806A SEMTECH [Semtech Corporation], XE8806A Datasheet - Page 118

• Manufacturer Part Number: XE8806A
• Description: Ultra Low-Power Low-Voltage
• Manufacturer: SEMTECH [Semtech Corporation]

The values that are read in the registers RegUsrtS1 and RegUsrtS0 are not necessarily the same as the values
that were written in the register. The read value is read back on the circuit pins not in the registers themselves.
Since the outputs are open drain, an external circuit on the circuit pins may force a value different from the register
value.
© Semtech 2006
7-1
0
7-4
3
2
1
0
7-1
0
7-1
0
7-1
0
7-1
0
pos.
pos.
pos.
pos.
pos.
pos.
“0000000”
UsrtS0
“0000”
UsrtWaitS0
UsrtEnWaitCond1
UsrtEnWaitS0
UsrtEnable
“0000000”
UsrtCond1
“0000000”
UsrtCond2
“0000000”
UsrtBufferS1
“0000000”
UsrtEdgeS0
RegUsrtBufferS1
RegUsrtEdgeS0
RegUsrtCond1
RegUsrtCond2
RegUsrtCtrl
RegUsrtS0
r
r
r/w
r/w
r/w
r
r/c
r
r/c
r
r
r
r
r
r/w
rw
rw
rw
rw
rw
rw
0 nresetglobal
0 nresetglobal
0 nresetglobal
0 nresetglobal
0 nresetglobal
0 nresetglobal
0 nresetglobal
-
1 nresetglobal
-
-
-
-
0 nresetglobal
-
Table 16-7: RegUsrtBufferS1
Table 16-8: RegUsrtEdgeS0
Table 16-5: RegUsrtCond1
Table 16-6: RegUsrtCond2
Table 16-4: RegUsrtCtrl
Table 16-3: RegUsrtS0
reset
reset
reset
reset
reset
reset
16-3
Unused
Clock stretching flag (0=no stretching),
cleared by writing RegUsrtBufferS1
Enable stretching on UsrtCond1 detection
(0=disable)
Enable stretching operation (0=disable)
Enable USRT operation (0=disable)
Unused
State of condition 1 detection (1 =detected),
cleared when written.
Unused
State of condition 2 detection (1 =detected),
cleared when written.
Unused
Value on S1 at last S0 rising edge.
Unused
State of rising edge detection on S0
(1=detected). Cleared by reading
RegUsrtBufferS1
Unused
Write: clock S0 written to pad PB[4],
Read: value on PB[4] (not UsrtS0 value).
function
function
function
function
function
function
XE8806A/XE8807A
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