XE8801AMI027LF Semtech, XE8801AMI027LF Datasheet - Page 93
XE8801AMI027LF
Manufacturer Part Number
XE8801AMI027LF
Description
IC DAS 16BIT FLASH 8K MTP 44LQFP
Manufacturer
Semtech
Datasheet
1.XE8801AMI027LF.pdf
(135 pages)
Specifications of XE8801AMI027LF
Applications
Sensing Machine
Core Processor
RISC
Program Memory Type
FLASH (22 kB)
Controller Series
XE8000
Ram Size
512 x 8
Interface
UART, USRT
Number Of I /o
24
Voltage - Supply
2.4 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
44-LQFP
For Use With
XE8000MP - PROG BOARD AND PROSTART2 CARD
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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16.5 Input Multiplexers
The ZoomingADC™ has eight analog inputs AC_A(0) to AC_A(7) and four reference inputs AC_R(0) to AC_R(3).
Let us first define the differential input voltage V
and:
As shown in Table 16-11 the inputs can be configured in two ways: either as 4 differential channels (V
- AC_A(0),..., V
paths all referred to AC_A(0). The control word for the analog input selection is AMUX[4:0]. Notice that the bit
AMUX[3] controls the sign of the input voltage.
Similarly, the reference voltage is chosen among two differential channels (V
AC_R(3)-AC_R(2)) as shown in Table 16-12. The selection bit is VMUX. The reference inputs V
(common-mode) can be up to the power supply range.
© Semtech 2005
V
(RegAcCfg5[5:1])
V
IN
REF
AMUX[4:0]
=
V
=
00x00
00x01
00x10
00x11
10000
10001
10010
10011
10100
10101
10110
10111
INP
V
REFP
IN4
−
V
INN
= AC_A(7) - AC_A(6)), or AC_A(0) can be used as a common reference, providing 7 signal
−
V
REFN
AC_A(1)
AC_A(3)
AC_A(5)
AC_A(7)
AC_A(0)
AC_A(1)
AC_A(2)
AC_A(3)
AC_A(4)
AC_A(5)
AC_A(6)
AC_A(7)
V
(V)
(V)
INP
(RegAcCfg5[0])
Table 16-12. Analog Reference input selection
VMUX
AC_A(0)
AC_A(2)
AC_A(4)
AC_A(6)
AC_A(0)
0
1
V
Table 16-11. Analog input selection
INN
IN
and reference voltage V
AC_R(1)
AC_R(3)
V
(RegAcCfg5[5:1])
16-8
REFP
AMUX[4:0]
01x00
01x01
01x10
01x11
11000
11001
11010
11011
11100
11101
11110
11111
AC_R(0)
AC_R(2)
V
REFN
(Eq. 3)
(Eq. 4)
REF
AC_A(0)
AC_A(2)
AC_A(4)
AC_A(6)
AC_A(0)
respectively as:
REF1
V
INP
= AC_R(1)-AC_R(0) or V
XE8801A – SX8801R
AC_A(1)
AC_A(3)
AC_A(5)
AC_A(7)
AC_A(0)
AC_A(1)
AC_A(2)
AC_A(3)
AC_A(4)
AC_A(5)
AC_A(6)
AC_A(7)
V
INN
www.semtech.com
REFP
IN1
= AC_A(1)
and V
REF2
REFN
=
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