AD7879ACPZ-RL Analog Devices Inc, AD7879ACPZ-RL Datasheet - Page 27

• Manufacturer Part Number: AD7879ACPZ-RL
• Description: IC ADC 12BIT CTLR TOUCH 16LFCSP
• Manufacturer: Analog Devices Inc
• Type: Touch Screen Controller: 4-Wire Resistiver

Specifications of AD7879ACPZ-RL

• Resolution (bits): 12 b
• Data Interface: I²C
• Package / Case: 16-LFCSP
• Mounting Type: Surface Mount
• Voltage - Supply: 1.6 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Voltage Supply Source: Single Supply
• Sampling Rate (per Second): 105k
• Sampling Rate: 105kSPS
• Supply Voltage Range - Analog: 1.6V To 3.6V
• Supply Current: 480µA
• Digital Ic Case Style: CSP
• No. Of Pins: 16
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

CONTROL REGISTER 3
Control Register 3 (Address 0x03) includes the interrupt
register (Bits[15:8]) and Control Register 3 (Bits[7:0]).
Sequencer
The sequencer bits control which channels are converted during
a conversion sequence in both slave and master mode.
To include a measurement in a sequence, the relevant bit must
be set in the sequence. Setting Bit 7 includes a measurement on
the X+ channel (Y position). Setting Bit 6 includes a measure-
ment on the Y+ channel (X position), and so on.
Figure 32 illustrates the correspondence between the bits in
Control Register 3 and the various measurements. Bit 0
is not used.
15
MASK
TEMP
MASK
VBAT
AUX/
MODE
INT
ALERT
GPIO
VBAT
AUX/
LOW
VBAT
HIGH
AUX/
Figure 31. Control Register 3
TEMP
LOW
Rev. 0 | Page 27 of 36
TEMP
HIGH
X+
Y+
CONVERSION
SINGLE
Z1
01
Z2
AUX
Figure 32. Conversion Modes
WAIT FOR TIMER
CONVERSION
SLAVE MODE
START TIMER
ADC MODE?
TIMER = 00?
VBAT TEMP
SEQUENCE
IDLE
10
NO
00
USED
NOT
0
WAIT FOR TIMER
MASTER MODE
FIRST TOUCH
CONVERSION
START TIMER
TIMER = 00?
SEQUENCE
TOUCHED?
TOUCHED?
WAIT FOR
SCREEN
SCREEN
YES
NO
YES
11
AD7879
YES
NO
NO