ak4184a AKM Semiconductor, Inc., ak4184a Datasheet - Page 4

• Manufacturer Part Number: ak4184a
• Description: Tsc With Keypad Scanner And Gpio Expander
• Manufacturer: AKM Semiconductor, Inc.

No.
A1
B1
C2
C1
D2
D1
E2
E1
F2
G1
F1
G2
F3
G3
F4
G4
MS0947-E-00
NC
KEYIRQN
BUSY
DOUT
DIN
SCLK
CSN
RESETN
PENIRQN
NC
VSS1
YN
XN
YP
XP
AVDD
Pin Name
I/O
I/O
I/O
I/O
I/O
O
O
O
O
-
I
I
I
I
-
-
-
No Connection
Keypad Interrupt (Active Low)
BUSY output
Serial Data Output
Serial Data Input
External Clock Input
Chip Select Input (Active Low)
Device Reset (Active Low)
Pen Interrupt Output (Active Low)
No Connection
Analog Ground
Touch Screen Y- plate Voltage Supply
Touch Screen X- plate Voltage Supply
Touch Screen Y+ plate Voltage Supply
Touch Screen X+ plate Voltage Supply
Analog Power Supply: 2.5V ~ 3.6V
No internal bonding. This pin should be open or connected to the ground.
This pin is “L” on a key press (when the AK4184A is allowed to detect a key press).
This pin is “H” after a debounce scan is completed. This is always “H” when the
device is in key interrupt disable state.
Keypad scanner: This pin stays “H” when the keypad scanner is on the debounce scan.
Touch Screen controller: This pin stays “H” from the end of sampling time to the
timing of the MSB data out.
Data is clocked at SCLK falling edge. DOUT pin is “L” when this part does not
produce data at the CSN=“L”. This pin is Hi-Z when CSN keeps “H”.
Data is clocked on the rising edge of SCLK. Must keep “L” while not issuing
command.
Enables writing data to registers when CSN pin = “L”.
PENIRQN pin is “L” when touch-screen pressed is detected and the CSN pin is “H”.
This pin is “H” irrespective of touch screen press when pen interrupt is not enabled.
The state is dependent upon power down mode. See
Interrupt for reference.
No internal bonding. This pin should be open or connected to the ground.
measurement.
panel
measurement.
Y axis measurement: Supplies voltage to the Y- position input
X axis measurement: OPEN state
Pen Pressure Measurement: This pin is the input for the A/D converter for Z2
Pen Waiting State: connected to GND.
X axis measurement: Supplies voltage to the X- position input
Y axis measurement: OPEN state
Pen Pressure Measurement: Supplies the voltage to X- position input of the touch
Pen Waiting State: OPEN state
X axis measurement: Supplies voltage to the X- position input
Y axis measurement: OPEN state
Pen Pressure measurement voltage supply
Pen Waiting State: OPEN state
X axis measurement: Supplies voltage to the X+ position input
Y axis measurement: This pin is used for the input to the A/D converter
Pen Waiting State: Pulled up by an internal resistor (typ.50KΩ).
Pen Pressure measurement: This pin is the input for the A/D converter for Z1
PIN/FUNCTION
- 4 -
Function
Power-down control and
[AK4184A]
2008/04
Pen