Diodes AP389X User Manual

Page 1
Data Sheet
Enhanced Multi-touch Capacitive Touch Screen Controller AP389X
The AP389X is a low-cost high-resolution single chip solution for APA capacitive touch screen. It is an 8-bit single cycle 8051 microcontroller with I Interface. The chip includes 8-bit successive approximation analog-to-digital converters with an
2
I
C interface and multiplexer-switcher circuits for flexible measurement of analog signal from APA panel. An accurate switched-capacitor integrator is built-in and it can auto calibrate the pixel parameters for a wide range of capacitance on the touch screen (0.1pF to 4pF). On-chip capacitor can replace external component. This touch screen controller (TSC) with CMOS integration circuit provides an ideal choice for APA touch panel. The AP389X is specified over the temperature range of -40°C to 95°C.
The AP389X is available in QFN-7×7-56 (for AP3890) and QFN-8×8-68 (for AP3891 and AP3892) packages.
2
Features
Mutual Capacitive Touch Sensing
• Dual Power Supply: 2.8V to 3.6V Operation
Voltage; 1.6V to 2.0V Operation Voltage
Up to 30/38/36 Drive Lines and 17/22/23 Sense
Lines
• Dedicated Internal Two-wire Serial Control Bus
2
I
C and UART between AP389X and Host
Single-end Integrator with Programmable Gain
Control and Offset Control
• Multiplexed Analog Digitization with Two 8-bit
Resolution Odd/Even Scan SAR ADCs and Its Dedicated 2X to 8X Accumulator XSRAM Buffers
QFN-7×7-56
Figure 1. Package Types of AP389X
Apr. 2013 Rev. 1. 0 BCD Semiconductor Manufacturing Limited
Features (Continued)
Single Cycle 8051 CPU Core, Maximum Opera-
ting Clock up to 24MHz from IOSC (Zero Wait
C
State); 48MHz from IOSC(With Wait State) 4MHz to 48MHz Internal Oscillator (IOSC) 64K-byte Flash ROM 256-byte Internal SRAM and 12032-byte XSRAM Extra XSRAMs for AFE:
896×12-bit×2 XSRAM for 8-bit SAR ADC
896×8-bit XSRAM for 8-bit Parasitical
Capacitor Compensator Two 16-bit Timers T0/T1 and One 16-bit ECT Timer T2
2
One I
C Slave Controller and One I2C Master
Controller Shared with the Same Port
With Asynchronous I
Detection Logic Design 4 General Purpose GPIO Pins One External Interrupt Pin One UART Data Transfer Output Pin
• ISP/IAP via I²C Port
• Operation Temperature Range: -40°C to 95°C
• Package Types: QFN-7×7-56 and QFN-8×8-68
• RoHS Compliance
• O perating Mode:
Mode Description Power-down No scan with power-down mode Standard Higher scan rate when fingers are
on panel, IOSC can up to 4MHz to 48MHz
2
C Slave Address
Applications
• Mobile Phones
• Personal Digital Assistants
• Smart Hand-held or Gaming Devices
1
QFN-8×8-68
Page 2
Data Sheet
Enhanced Multi-touch Capacitive Touch Screen Controller AP389X
Pin Configuration
FN Package (QFN-7×7-56)
Pin 1 Mark
56
1 2 3
4 5 6 7 8 9
10 11
12
13 14
15
16
17 18 19 20 21 22 23 24 25 26 27 28
EP
43444546474849505152535455
42 41 40
39 38 37 36 35 34 33 32 31 30 29
Figure 2. Pin Configuration of AP3890 (Top View)
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Page 3
Data Sheet
Enhanced Multi-touch Capacitive Touch Screen Controller AP389X
Pin Configuration (Continued)
FN Package
(QFN-8×8-68)
Pin 1 Mark
S8
P1.7/
TXD1
/PINT0.1/EXTCLKIN
TESTEN P1.2/SDA P1.3/SCL
RSTN
D38 D37 D36 D35 D34 D33 D32 D31 D30 D29 D28 D27
/T0
S22
68
1 2 3 4 5 6 7 8 9
10
11 12 13 14 15 16
17
18
S19
S20
S21
67
66
65
202122232425262728293031323334
19
S16
S14
S15
S17
S18
63626160595857
64
EP
S13
S11
S10
S12
5655545352
69 VSS
S9
S7
S6
51
S5
50
S4
49
S3
48
S2
47
S1
46
VDD33
45
VDD18
44
P3.6/RXD1(GPIO18)
43
D1
42
D2
41
D3
40
D4
39
D5
38
D6
37
D7
36
D8
35
D9
D24
D22
D26
D25
D23
D21
D20
D19
D18
D17
D16
D15
D14
D13
D12
D11
D10
Figure 3. Pin Configuration of AP3891 (Top View)
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Data Sheet
Enhanced Multi-touch Capacitive Touch Screen Controller AP389X
Pin Configuration (Continued)
FN Package
(QFN-8×8-68)
S8
S9
S23
68
S22
67
S21
66
S17
S18
S19
S20
63626160595857
64
65
S16
S15
S14
S13
S12
5655545352
S11
S10
S7
202122232425262728293031323334
18
19
D9
D24
D23
D22
D21
D20
D19
D18
D17
D16
D15
D14
D13
D12
D11
D10
D8
Figure 3. Pin Configuration of AP3892 (Top View)
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Data Sheet
Enhanced Multi-touch Capacitive Touch Screen Controller AP389X
Pin Description
Pin Number
QFN-56 AP3890
QFN-68
AP3891 AP3892
1 1 1
2 2 2 TESTEN I
3 3 3
4 4 4
5 5 5 RSTN I
Pin Name
P1.7/
TXD1/
PINT0.1/
EXTCLKIN/
T0
P1.2/SDA
(open-drain)
P1.3/SCL
(open-drain)
Pin
Type
I/O
I/O
I/O
Pin Function
Port 1.7 GPIO
8051 P1.7 GPIO
TXD1
This pin also can be configured as TXD of UART 1
PINT0.1
This pin also can be configured as the expanded INT0 interrupt
External Clock Input External clock input source. T0 Timer 0 Input
This pin also can be configured as Timer 0 input
Test Mode Enable High Active This pin has an internal weakly pull low
resistor connected. If it is connected high, the chip enters into Test Mode condition
Port 1.2 GPIO
8051 P1.2 GPIO
SDA
This pin also can be configured as the SDA signal of the I2C master or I2C slave controller. In this operation mode, this pin should also be configured as bi-directional I/O with open-drain output
Port 1.3 GPIO
8051 P1.3 GPIO
SCL
This pin also can be configured as the SCL signal of the I
2
In I
C master mode, this pin should be configured as open-drain output. In I this pin should be configured as input only
Reset Low Active
Typically connect a resistor to VDD18 and a capacitor to VSS Low asserted and threshold at 0.5×V forced low, the chip enters into reset condition This pin should not be connected to any level above V
2
C master or I2C slave controller.
DD18
2
C slave,
. When
DD18
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Data Sheet
Enhanced Multi-touch Capacitive Touch Screen Controller AP389X
Pin Description (Continued)
Pin Number
QFN-56 AP3890
-
- 8 to 13 6 to 11
6 to 35
36 44 42
37 69 43 VSS Power
38 45 44 VDD18 Power
39 46 45 VDD33 Power
40 to 56
-
- - 68 S23 I, A
QFN-68
AP3891 AP3892
6, 7
14 to
43
47 to
63
64 to
68
-
12 to
41
46 to
62
63 to
67
Pin
Name
D38,
D37
D36 to
D31
D30 to
D1
P3.6/ RXD1 (open-
drain)
S1 to
S17
S18 to
S22
Pin
Type
O, A
O, A
O, A
I/O
I, A
I, A
Pin Function
D38, D37
Driving line 38 to line 37
D36, D35, D34, D33, D32, D31
Driving line 36 to line 31
D30, D29, D28, D27, D26, D25, D24, D23, D22, D21, D20, D19, D18, D17, D16, D15, D14, D13, D12, D11, D10, D9, D8, D7, D6, D5, D4, D3, D2, D1
Driving line 30 to line 1 Port 3.6 GPIO
8051 P3.6 GPIO This pin should be configured as open-drain output and the input range can be 1.8V to 3.3V
RXD1 This pin also can be configured as RXD of UART 1
Ground Voltage. 0V Internal Regulator Output. 1. 6V to 2.0V
Typical decoupling capacitors of 0.1F and 10F should be connected between VDD18 and VSS
Supply Voltage. 2.8V to 3.6V
A good decoupling capacitor between VDD33 and VSS is critical for good performance
S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S13, S14, S15, S16, S17
Sensing line 1to line 17 S18, S19, S20, S21, S22 Sensing line 18 to line 22 S23 Sensing line 23
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Data Sheet
Enhanced Multi-touch Capacitive Touch Screen Controller AP389X
Functional Block Diagram
VSS P1.7
TESTEN
SDA SCL
RSTN
D38 D37 D36 D35 D34 D33 D32 D31 D30 D29 D28 D27 D26 D25 D24 D23 D22
896ٛ8-bit SRAM
(CMOD_Buffer)
64K Flash
D[38:1]
MUX
POR18 POR33
LVD
S23
INT
S22
S21
S20
S19
Stage 4
Stage 5
Stage 6
Stage 7
Stage 8
Stage 9
/
Stage 23
Mode Control
Register Table
SFR
S18
Analog signals S[23:1]
DAI S/H
Stage 1
Stage 2
Stage 3
S17
Stage 0
S15
S16
FIFO
4~48M
OSC
CLK
12K SRAM
MCU
MDU
I2C M/S
D12
D13
D14
D15
D16
D17
D18
D19
D20
D21
D9
D11
D10
D8
D7
D6
Figure 4. Main AFE I/O Pin Assignment and Whole Chip’s Functional Block Diagram
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S12
S13
S14
SWITCH MATRIX
SAR 8-bit
SAR
ADC
8-bit ADC
+
896ٛ12-bit SRAM
(SCAN_Buffer)
896ٛ12-bit SRAM
(Baseline)
D4
D2
D3
D5
S11 S10
S9 S8 S7 S6 S5 S4 S3 S2 S1
-
VDD33
VDD18
P3.6
D1
Page 8
Data Sheet
Enhanced Multi-touch Capacitive Touch Screen Controller AP389X
Ordering Information
AP389 -
Circuit Type
0: AP3890 1: AP3891 2: AP3892
G1: Green
Blank: Tray TR: Tape & Reel
Package FN: QFN-7×7-56
/QFN-8×8-68
Package Temperature Range Part Number Marking ID Packing Type
QFN-7x7-56
QFN-8x8-68
QFN-8x8-68
BCD Semiconductor's Pb-free products, as designated with "G1" in the part number, are RoHS compliant and green.
-40 to 95°C
AP3890FN-G1 AP3890FN-G1 Tray AP3890FNTR-G1 AP3890FN-G1 Tape & Reel AP3891FN-G1 AP3891FN-G1 Tray AP3891FNTR-G1 AP3891FN-G1 Tape & Reel AP3892FN-G1 AP3892FN-G1 Tray AP3892FNTR-G1 AP3892FN-G1 Tape & Reel
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Data Sheet
Enhanced Multi-touch Capacitive Touch Screen Controller AP389X
AP389X Support 7” to 13” Touch Panel, Listed Below:
PN TX/ RX Multi - Touch Package Panel size
AP3890 30/17 10 point 100HZ QFN-7x7-56 7” to 10” AP3891 38/22 10 point 100HZ QFN-8x8-68 8” to 13” AP3892 36/23 10 point 100HZ QFN-8x8-68 8” to 13”
Absolute Maximum Ratings (Note 1)
Parameter Symbol Value Unit
Supply Voltage 1 VDD 2.8 to 3.6 V Supply Voltage 2 V Analog Input Voltage (Other pins) V Logic Input Voltage V Power Dissipation PD 250 mW Maximum Junction Temperature TJ 100 °C Operating T em perature TOP -40 to 95 °C Storage Temperature T
1.6 to 2.0 V
DD18
-0.3 to VDD+0.3 V
DDA
-0.3 to VDD+0.3 V
DDD
-65 to 150 °C
STG
Note 1: Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “Recommended Operating Conditions” is not implied. Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability.
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Data Sheet
Enhanced Multi-touch Capacitive Touch Screen Controller AP389X
Electrical Characteristics
DA/AC Characteristics for AFE
TA=–40°C to 95°C, VDD=3.3V, I2C bus frequency=400kHz, unless otherwise noted.
Parameter Symbol Test Condition Min Typ Max Unit
ADC DC Accuracy
Resolution 8 Bits No Missing Codes Integral Linearity Error INL
Differential Linearity Error Offset Error
DNL External V
Gain Error
Analog Input
Full-scale Input Span Absolute Input Range
ADC Sampling Dynamics
Throughput Rate 500 ksps
Reference Input
Input Voltage Range 1.8 VDD V
Switched-capacitor Integrator
Output Voltage Range 0.3 VDD-0.3 V Integrator Capacitor C
INT
Digital Input/Output Logic Family CMOS Input High Voltage VIH 0.7×VDD V Input Low Voltage VIL -0.3 0.3×VDD V Output High Voltage VOH 0.8×VDD V Output Low Voltage VOL 0.4 V
Input High Voltage for P3.6 (GPIO18) Input Low Voltage for P3.6 (GPIO18) Output High Voltage for P3.6 (GPIO18) Output Low Voltage for P3.6 (GPIO18)
V
V
V
V
IH18
IL18
OH18
OL18
Power Supply
Supply Voltage VDD Operating voltage 2.8 3.6 V
Quiescent Current
Temperature Range
Specified Performance -40 95 °C
Standard/Fast Standard/Fast
REF
6 8 Bits
±2 LSB
0
-0.2
±1
V
±2 ±1
VDD
DD
+0.2
LSB LSB LSB
V V
12 pF
+0.3 V
DD
0.7×V
DD18
-0.3 0.3×V
0.8×V
DD18
0.2×V
Standard mode: IOSC=4MHz to 48MHz
Power-down mode
V
+0.3 V
DD18
V
DD18
V
V
DD18
TBD
10
mA
A
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Data Sheet
Enhanced Multi-touch Capacitive Touch Screen Controller AP389X
Electrical Characteristics (Continued)
DA/AC Characteristics for AFE
TA=–40°C to 95°C, VDD=3.3V, I2C bus frequency=400kHz, unless otherwise noted.
Parameter Symbol Test Condition Min Typ Max Unit
3.3V-to-1.8V LDO
Internal 1.8V Regulator Output Output Voltage Trimming Level
Internal OSC
Frequency 4 48 MHz Operating Current
Frequency Trimming Level
V
,
DD18
15mA
1.6 1.8 2.0 V
-2/4/6 0 2/4/6 %
Operating frequency=12MHz
-10/20/30 0 10/20/30 %
50
A
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Data Sheet
Enhanced Multi-touch Capacitive Touch Screen Controller AP389X
Electrical Characteristics (Continued)
DA/AC Characteristics for 8051 CPU Core, Digital GPIO pins, Digital Peripherals, and IOSC
T
=–40°C to 95°C, VDD=2.8V to 3.6V, unless otherwise noted.
A
Parameter Symbol Min Typ Max Unit Note
Power Supply Current
Normal Mode Supply Current Using IOSC up to 48MHz Normal Mode Supply Current Using IOSC=4MHz PMM Mode Supply Current Using IOSC up to 48MHz PMM Mode Supply Current Using IOSC=4MHz Idle Mode Supply Current Using IOSC up to 48MHz Stop Mode Supply Current Using IOSC Keeps Low
I
, normal IOSC1 25 mA 2
DD
I
, normal IOSC2 2.9 mA 2
DD
I
, PMM IOSC1 6 mA 2
DD
, PMM IOSC2 1.5 mA 2
I
DD
I
, idle IOSC1 3 mA 2
DD
I
, stop 3
DD
A
2
Digital GPIO Characteristics
Input High Voltage VIH 2 3.6 V 3 Input Low Voltage VIL -0.3 0.8 V 3 Output High Voltage VOH 2.4 V 3 Output Low Voltage VOL 0.4 V 3
I
(2mA) 3.0 7.87 12.9 mA
High Level Output Current @V
(min)
OH
Low Level Output Current @V
(max)
OL
Input Pull Up Resistance RPU 34 74 Input Pull Down Resistance RPD 29 86
OH
IOH(4mA) 7.7 15.6 25.8 mA
I
(2mA) 3.4 5.4 7.4 mA
OL
IOL(4mA) 6.7 10.7 14.7 mA
k k
3
3 Input Low to High Level, RSTN VIH, RSTN 0.85 0.93 V 4 Input High to Low Level, RSTN VIL, RSTN 0.63 0.71 V 4 Output Rise Time t Output Fall Time t
5 ns 7
RISE
5 ns 7
FALL
Internal 3.3V-to-1.8V LDO from AFE
Internal 1.8V Regulato r Output V Power On/Off Reset Level V
, 15mA 1.6 1.8 2.0 V 5
DD18
, Reset 80 85 90 % 6
DD18
Note 2: Does not include load current and tested under NOP loop and all peripheral disabled. Note 3: For Digital I/O only. Note 4: For RSTN pin only. Note 5: Supply to internal digital and analog circuit only. Note 6: This is measured as the percentage of steady state value of V
DD18
.
Note 7: This is measured with 20pF load and 20% to 80% output level.
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Data Sheet
Enhanced Multi-touch Capacitive Touch Screen Controller AP389X
Typical Application
AP3890
Figure 5. Typical Application Schematic of AP3890 (For QFN-7×7-56 Package)
AP3891
Figure 6. Typical Application Schematic of AP3891 (For QFN-8×8-68 Package)
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Data Sheet
Enhanced Multi-touch Capacitive Touch Screen Controller AP389X
Typical Application (Continued)
AP3892
Figure 7. Typical Application Schematic of AP3892 (For QFN-8×8-68 Package)
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Data Sheet
Enhanced Multi-touch Capacitive Touch Screen Controller AP389X
Mechanical Dimensions
QFN-7×7-56 Unit: mm(inch)
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Data Sheet
Enhanced Multi-touch Capacitive Touch Screen Controller AP389X
Mechanical Dimensions (Continued)
QFN-8×8-68 Unit: mm(inch)
7.900(0.311)
8.100(0.319)
0.700(0.028)
0.800(0.031)
7.900(0.311)
8.100(0.319)
Pin 1 Mark
0.000(0.000)
0.050(0.002)
0.203(0.008) REF
0.300(0.012)
0.500(0.020)
E
N35
0.400(0.016)
68
67
66465
N52
BSC
1 2 3
D
0.150(0.006)
0.250(0.010)
DETAIL A
68
67
66465
Pin 1 Options
PIN
#1 IDENTIFICATION
See DETAIL A
N68
N1
N18
68
67
66465
1 2 3
1 2 3
4.500
5.600
D
0.169 0.177
0.213 0.220
4.300
.
5.400
.
Symbol
min(mm) max(mm) max(mm)min(mm)min(inch) min(inch)max(inch) max(inch)
Option1 Option2
4.300
5.400
Option3 6.100 6.300 0.240 0.248 6.3006.100 0.240 0.248
4.500
5.600
E
0.169
0.213
0.177
0.220
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Data Sheet
Enhanced Multi-touch Capacitive Touch Screen Controller AP389X
Mounting Pad Layout
QFN-7×7-56
X
Y
Y2
E
Y3
X1
E
X2
X3
Y1
Dimensions
X=Y
(mm)/(inch)
Value 7.400/0.291 5.400/0.213 0.250/0.010 0.700/0.028 0.400/0.016
X1=Y1
(mm)/(inch)
X2=Y2
(mm)/(inch)
X3=Y3
(mm)/(inch) E (mm)/(inch)
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Data Sheet
Enhanced Multi-touch Capacitive Touch Screen Controller AP389X
Mounting Pad Layout (Continued)
QFN-8×8-68
Dimensions
Option1 8.400/0.331 4.700/0.185 0.250/0.010 0.400/0.016 0.700/0.028 Option2 8.400/0.331 5.800/0.228 0.250/0.010 0.400/0.016 0.700/0.028 Option3 8.400/0.331 6.500/0.256 0.250/0.010 0.400/0.016 0.700/0.028
X=Y
(mm)/(inch)
X1=Y1
(mm)/(inch)
X2=Y2
(mm)/(inch) E (mm)/(inch)
X3=Y3
(mm)/(inch)
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BCD Semiconductor (Taiwan) Company Limited
Advanced Analog Circuits (Shanghai) Corporation
Tel: +86-21-6485 1491, Fax: +86-21-5450 0008
3F, No.17, Lane 171, Sec. 2, Jiu-Zong Rd., Nei-Hu Dist., Taipei(114), Taiwan, R.O.C
8F, Zone B, 900, Yi Shan Road, Shanghai 200233, China
Tel: +886-2-2656 2808
Tel: +86-21-6495 9539, Fax: +86-21-6485 9673
Fax: +886-2-2656-2806/26562950
Taiwan Office BCD Semiconductor (Taiwan) Company Limited
USA Office
Taiwan Office
4F, 298-1, Rui Guang Road, Nei-Hu District, Taipei,
BCD Semiconductor Corp.
BCD Semiconductor (Taiwan) Company Limited
Tai wan
48460 Kato Road, Fremont, CA 94538, USA
4F, 298-1, Rui Guang Road, Nei-Hu District, Taipei,
Tel: +886-2-2656 2808
Tel: +1-510-668-1950
Taiwan
Fax: +886-2-2656 2806
Fax: +1-510-668-1990
Tel: +886-2-2656 2808 Fax: +886-2-2656 2806
USA Office
Korea Office BCD Semiconductor Limited Korea office.
Room 101-1112, Digital-Empire II, 486 Sin-dong, Yeongtong-Gu, Suwon-city, Gyeonggi-do, Korea Tel: +82-31-695-8430
BCD Semiconductor Corp.
USA Office
30920 Huntwood Ave. Hayward,
BCD Semiconductor Corporation
CA 94544, USA
30920 Huntwood Ave. Hayward,
Tel : +1-510-324-2988
CA 94544, U.S.A
Fax: +1-510-324-2788
Tel : +1-510-324-2988 Fax: +1-510-324-2788
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