ak4182a AKM Semiconductor, Inc., ak4182a Datasheet - Page 3

• Manufacturer Part Number: ak4182a
• Description: Touch Screen Controller
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
MS0482-E-01
No.
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
BUSY
DIN
CSN
DCLK
VCC
XP
YP
XN
YN
GND
VBAT
IN
VREF
IOVDD
PENIRQN
DOUT
Signal Name
I/O
I/O
I/O
I/O
I/O
I/O
O
O
O
I
I
I
-
-
I
I
BUSY Output
Serial Data Input
Chip Select Input
External Clock Input
Power Supply
Touch Screen X+ plate Voltage supply
Touch Screen Y+ plate Voltage supply
Touch Screen X- plate Voltage supply
Touch Screen Y- plate Voltage supply
Ground
Analog Input for Battery Monitor
Auxiliary Analog Input
Voltage Reference Input/Output
Digital I/O Power Supply
Pen Interrupt Output
Serial A/D Data Output
This pin goes to low at CSN = “L”. BUSY signal is “H” only for the period between the
falling edge of 8
This pin is Hi-Z state at CSN= “H”
Inputs 8-bit control command data serially when CSN= “L”
AK4182A latches at the rising edge of DCLK. Must keep “L” while not issuing commands.
Enables writing data to the registers when CSN= “L”.
2.5V reference voltage output at PD1 = “1”. Voltage reference input at PD1 = “0”.
This pin is “L” during the pen down on pen interrupt enable state with CSN =“H” otherwise
this pin is “H”. This pin is “H” during pen interrupt disable state with the CSN = “H”
regardless pen touch. See
Output A/D data serially at the falling edge of DCLK. MSB is output at the falling edge of
BUSY signal.
Output “L” at CSN= “L” during A/D data does not output.
This pin is Hi-Z state at CSN= “H”
X axis Measurement: Supplies the voltage to X+ position input
Y axis Measurement: This pin is used as the input for the A/D converter
Pen Pressure Measurement: This pin is the input for the A/D converter at Z1 measurement.
Temperature/VBAT/IN Measurement: OPEN state
Pen Waiting State: Pulled up by an internal resistor (typ.50KΩ).
Y axis Measurement: Supplies the voltage to Y+ position input
X axis Measurement: This pin is used as the input for the A/D converter
Pen Pressure Measurement: Supplies the voltage.
Temperature/VBAT/IN Measurement: OPEN state
Pen Waiting State: OPEN state
Y axis Measurement: Supplies the voltage to Y- position input
X axis Measurement: OPEN state
Pen Pressure Measurement: This pin is the input for the A/D converter at Z2 measurement.
Temperature/VBAT/IN Measurement: OPEN state
Pen Waiting State: connected to GND.
X axis Measurement: Supplies the voltage to X- position input
Y axis Measurement: OPEN state
Pen Pressure Measurement: Supplies the voltage.
Temperature/VBAT/IN Measurement: OPEN state
th
PIN/FUNCTION
DCLK and the falling edge of 9
3
Power-down Control
Description
th
and
DCLK.
Pen Interrupt
for the reference.
[AK4182A]
2006/12