Datasheet

AR1000 SERIES RESISTIVE TOUCH SCREEN CONTROLLER
DS41393B-page 52 Preliminary  2009-2012 Microchip Technology Inc.
11.1 Minimum Operating Voltage
The AR1000 series controller will operate down to 2.5V ± 5%. Touch performance will be optimized by using the high-
est allowable voltage for the design.
The PICkit Serial included in the AR1000 Development kit supports 3V-5V range of operation.
11.2 AR1000 Electrical Characteristics
Operating Voltage: 2.5 ≤ VDD ≤ 5.25V
Function Pin Input Output
M1 M1 V
SS ≤ VIL ≤ 0.15*VDD
(0.25*VDD + 0.9V) ≤ VIH ≤ VDD
—
M2 M2 V
SS ≤ VIL ≤ 0.15*VDD
(0.25*VDD + 0.9V) ≤ VIH ≤ VDD
—
SCL/SCK SCL/SCK/TX V
SS ≤ VIL ≤ 0.2*VDD
0.8*VDD ≤ VIH ≤ VDD
—
TX SCL/SCK/TX — V
SS ≤ VOL
(1)
≤ (1.2V – 0.15*VDD)
(2)
(1.25*VDD – 2.25V)
(3)
≤ VOH
(1)
≤ VDD
SDI SDI/SDA/RX VSS ≤ VIL ≤ 0.2*VDD
0.8*VDD ≤ VIH ≤ VDD
—
SDO SDO — V
SS ≤ VOL
(1)
≤ (1.2V – 0.15*VDD)
(2)
(1.25*VDD – 2.25V)
(3)
≤ VOH
(1)
≤ VDD
SIQ SIQ — VSS ≤ VOL
(1)
≤ (1.2V – 0.15*VDD)
(2)
(1.25*VDD – 2.25V)
(3)
≤ VOH
(1)
≤ VDD
SDA SDI/SDA/RX VSS ≤ VIL ≤ 0.2*VDD
0.8*VDD ≤ VIH ≤ VDD
Open-drain
RX SDI/SDA/RX V
SS ≤ VIL ≤ 0.2*VDD
0.8*VDD ≤ VIH ≤ VDD
—
SS SS V
SS ≤ VIL ≤ 0.2*VDD
0.8*VDD ≤ VIH ≤ VDD
—
Note 1: These parameters are characterized but not tested.
2: At 10 mA.
3: At -4 mA.