Diodes AP389X - Manual (Page 6)

Data Sheet
Enhanced Multi-touch Capacitive Touch Screen Controller AP389X
Apr. 2013 Rev. 1. 0 BCD Semiconductor Manufacturing Limited
6
Pin Description (Continued)
Pin Number
Pin
Name
Pin
Type
Pin Function
QFN-56
AP3890
QFN-68
AP3891 AP3892
- 6, 7 -
D38,
D37
O, A
D38, D37
Driving line 38 to line 37
- 8 to 13 6 to 11
D36 to
D31
O, A
D36, D35, D34, D33, D32, D31
Driving line 36 to line 31
6 to 35
14 to
43
12 to
41
D30 to
D1
O, A
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
36 44 42
P3.6/
RXD1
(open-
drain)
I/O
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
37 69 43 VSS Power Ground Voltage. 0V
38 45 44 VDD18 Power
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
39 46 45 VDD33 Power
Supply Voltage. 2.8V to 3.6V
A good decoupling capacitor between VDD33 and
VSS is critical for good performance
40 to 56
47 to
63
46 to
62
S1 to
S17
I, A
S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12,
S13, S14, S15, S16, S17
Sensing line 1to line 17
-
64 to
68
63 to
67
S18 to
S22
I, A
S18, S19, S20, S21, S22
Sensing line 18 to line 22
- - 68 S23 I, A
S23
Sensing line 23