XE8000EV120 Semtech, XE8000EV120 Datasheet - Page 44

• Manufacturer Part Number: XE8000EV120
• Description: BOARD EVAL FOR SX8722I070TRLF
• Manufacturer: Semtech
• Series: ZoomingADC™r

Specifications of XE8000EV120

• Number Of Adc's: 1
• Number Of Bits: 16
• Data Interface: I²C
• Inputs Per Adc: 7 Single or 4 Differential
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 125°C
• Utilized Ic / Part: SX8722
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: XM8000EV120; XM8000EV120

11.4.3. Filter size register
This register is present in each configuration; the bits 0 to 7 are controlling the filter size.
This register contains the number of samples used for the filtering.
Note that for a moving average filtering, this number is limited to 10.
(Putting a higher value will be interpreted as 10.)
11.5. Alarms
The SX8722 offers two alarms pins that have configurable on & off thresholds; these thresholds are on 16 bits.
Each configuration register set has 2 alarms, which can be enabled, when more than one configuration is using the same
alarm pin, logical function is interacting between the two alarms sources. This condition can be a logical OR (default) or a
logical AND.
11.5.1. Configuration register - alarms
The bits 2 & 3 enable the alarm 1 & 2 when set to 1.
11.5.2. Alarm threshold registers
ACS - Revision 4.2
©2008 Semtech Corp.
CxAlrm1OnMsb
CxAlrm1OnLsb
CxAlrm1OffMsb
CxAlrm1OffLsb
CxAlrm2OnMsb
CxAlrm2OnLsb
CxAlrm2OffMsb
CxAlrm2OffLsb
ADVANCED COMMUNICATIONS & SENSING
CxFParam
CxSXCfg
Table 31. Alarm threshold registers; addresses 0x12 to 0x19, 0x32 to 0x39, 0x52 to 0x59 and 0x72 to 0x79
Register
Register
Registers
Table 30. Alarm enabling in configuration registers; addresses 0x10, 0x30, 0x50, 0x70
reserved
7
7
7
Table 29. Filter size registers; addresses 0x11, 0x31, 0x51, 0x71
October 2008
6
6
6
FILTER TYPE [2:0]
5
5
5
Page 44
4
4
Filter size [7:0]
4
S1ALRM1OFF
S1ALRM1OFF
S1ALRM2OFF
S1ALRM2OFF
S1ALRM1ON
S1ALRM1ON
S1ALRM2ON
S1ALRM2ON
High gain acquisition for sensor interface
ALRM1
3
3
3
ALRM2
2
2
2
SINGLE
1
1
DATASHEET
1
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SX8722
CONT
0
0
0