XPT2046 查看數據表（PDF） - Unspecified
零件编号
产品描述 (功能)
生产厂家
XPT2046 Datasheet PDF : 30 Pages
| |||
XPT2046 Touch Screen Controller
A2 A1 A0
00
0
00
1
01
0
01
1
10
0
10
1
11
0
11
1
VBAT AUXIN
+IN
+IN
TEMP
YN
+IN
(TEMP0)
XP YP
+IN
Y-
POSITIO
X-
POSITION
Z1-
POSITION
Z2-
POSITION
X-
DRIVERS
off
M
Off
Off
+IN
M
XN, On
+IN
M
XN, On
+IN
M
On
Off
+IN
Off
Y-
DRIVERS
off
On
Off
YP, On
YP, On
Off
Off
Off
Table 4.Input Configuration (DIN), Differential Reference Mode (SER/DFR low)
A2 A1 A0 +REF −REF YN
Y-POSITION X-POSITION Z1-POSITION Z2-POSITION DRIVERS
XP
YP
0
0
1
YP
YN
+IN
M
0
1
1
YP
XN
+IN
1
0
0
YP
XN
+IN
1
0
1
XP
XN
+IN
M
M
YP,
YN
YP,
M
YP,
XP,
Table 5.Input Configuration (DIN), Differential Reference Mode (SER/DFR low)
Internal Reference
The XPT2046 has an internal 2.5V voltage reference that can be turned on or off with the control bit, PD1 (see
Table 8 and Figure 6. Typically, the internal reference voltage is onlyused in the single-ended mode for battery
monitoring, temperature measurement, and for using the auxiliary input.Optimal touch screen performance is
achieved when using the differential mode. The internal reference voltage of the XPT2046 must be commanded to
be off to maintain compatibility with the ADS7843. Therefore, after power-up,a write of PD1 = 0 is required to
insure the reference is off (see the Typical Characteristics for power-up time of the reference from power-down).
Figure 6. Simplified Diagram of the Internal Reference
Copyright©2007, SHENZHEN XPTEK TECHNOLOGY CO.,LTD http://www.xptek.com.cn
15/30
Share Link: 