XE8802MI000 SEMTECH [Semtech Corporation], XE8802MI000 Datasheet - Page 117

• Manufacturer Part Number: XE8802MI000
• Description: Sensing Machine Data Acquisition MCU
• Manufacturer: SEMTECH [Semtech Corporation]

17.4.2
Figure 17-2 shows a detailed functional diagram of the ZoomingADC™.
In Table 17-10 the configuration of the peripheral registers is detailed. The system has a bank of eight 8-bit
registers: six registers are used to configure the acquisition chain (RegAcCfg0 to 5), and two registers are used
to store the output code of the analog-to-digital conversion (RegAcOutMsb & Lsb). The register coding of the
ADC parameters and performance characteristics are detailed in Section 17.7.
© Semtech 2006
RegAcOutLsb
RegAcOutMsb
Default values:
Default values:
RegAcCfg0
RegAcCfg1
Register
Name
Peripheral Registers
Table 17-10. Peripheral registers to configure the acquisition chain (AC)
IB_AMP_ADC[1:0]
START
Inputs
AC_A
AC_R
7
0
RegACCfg4
RegACCfg5
RegACCfg3
RegACCfg2
RegACCfg1
RegACCfg0
and to store the analog-to-digital conversion (ADC) result
Figure 17-2. ZoomingADC™ detailed functional block diagram
11
0
1
2
3
4
5
6
7
0
1
2
3
SET_NELC[1:0]
6
V
01
5
IN
Power Saving Modes
PGA Enabling
Conversion Start
Nbr of Elementary Cycles
Over-Sampling Ratio
Continuous vs. On-Request
V
IB_AMP_PGA[1:0]
f
XE8802 Sensing Machine Data Acquisition MCU
S
REF
5
PGA1
GD1
2
11
OFF2
PGA2
GD2
4
Bit Position
OUT[15:8]
4
17-5
OUT[7:0]
SET_OSR[2:0]
with ZoomingADC™ and LCD driver
7
010
3
OFF3
7
PGA3
GD3
ADC Busy Flag
Default Settings
Sampling Frequency f
RegACOutMSB
RegACOutLSB
Acquisition Chain
Register Bank
ENABLE[3:0]
2
V
0001
IN,ADC
CONT
ADC
1
0
f
S
8
8
S
TEST
0
0
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