参数资料
型号: P95020ZLLGI
厂商: INTEGRATED DEVICE TECHNOLOGY INC
元件分类: 电源管理
英文描述: 2-CHANNEL POWER SUPPLY MANAGEMENT CKT, PBGA124
封装: LLGA-124
文件页数: 134/137页
文件大小: 3533K
代理商: P95020ZLLGI
P95020 / Preliminary Datasheet
Revision 0.7.10
96
2010 Integrated Device Technology, Inc.
12.0 TSC MODULE - ADC AND TOUCH SCREEN CONTROLLER
The P95020 includes a Touch Screen Controller and a General Purpose ADC. These functions make use of external I/O
that can also be used as General Purpose I/O (GPIO) when the Touch Screen Controller and General Purpose ADC are
not in use. This section will describe the operation of the Touch Screen Controller.
FEATURES
ADC – Analog to Digital Converter
12-bit 62.5 ksps successive approximation ADC
measures 8 channels
User-programmable conversion parameters
Auto shut-down between conversions
TSC – Touch Screen Controller
4-wire simple touch screen controller
Screen touch detection and interrupt generation
Automatic (master) mode for touch location
measurement
DESCRIPTION
The P95020 includes an ADC subsystem which operates
in two modes: Touch Screen Mode and General Purpose
ADC Mode. In Touch Screen Mode there are four input
pins reserved for the 4-wire resistive touch screen outputs
and a pen-down status signal is available to notify the host
processor. In General Purpose ADC Mode, the pins used
to connect the touchscreen in Touchscreen Mode are
used as general purpose analog signal inputs.
MUX
CH1
X-
Y- GND
X+
Y+
Dual 3 to 1 MUX
2.5V
REF
Vref
12-bit SAR ADC
REF+
REF-
FSM logic control
Control /status
registers
Result
registers
Pen interrupt and
wake-up on touch
A
D
C
D
a
ta
BUF
VBAT
ADC0/X+
ADC1/X-
ADC2/Y+
ADC3/Y-
VTEMP
PENDOWN
V
D
ADC_CLK
VSYS
ICHRG
INT
CH2
CH3
CH4
DIV/2
CKGEN
1MHz
R2
R1
Figure 28
ADC & Touchscreen Controller Block Diagram
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