MTCH112_12 Datasheet, PDF (16/48 Pages) Microchip Technology – Dual-Channel Proximity/Touch Controller

MTCH112
3.4 Low-Power Control Register
(LPCON)
This register provides the low-power options for the
MTCH112. It determines how long the device will sleep
when no detections have been made, and how fast the
internal oscillator will run. If the CLKSEL bit is set, the
valid VDD operating range will decrease. See the bit
description in Register 3-6 for more information.
REGISTER 3-6: LPCON: LOW-POWER CONTROL REGISTER
U-0
U-0
R/W-0/u
R/W-0/u
R/W-0/u
R/W-0/u
—
—
SLEEP<4:0>
bit 7
R/W-1/u
R/W-1/u
CLKSEL
bit 0
Legend:
R = Readable bit
u = Bit is unchanged
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
-n/n = Factory setting value/Value after all Resets
‘0’ = Bit is cleared
W = Writable bit
bit 7-6
bit 5-1
bit 0
Unimplemented: Read as ‘0’
SLEEP<4:0>: Sleep duration between scans when inactive
00000 = 1 ms, typical sleep duration
00001 = 2 ms, typical sleep duration
00010 = 4 ms, typical sleep duration
00011 = 8 ms, typical sleep duration
00100 = 16 ms, typical sleep duration
00101 = 32 ms, typical sleep duration
00110 = 64 ms, typical sleep duration
00111 = 128 ms, typical sleep duration
01000 = 256 ms, typical sleep duration
01001 = 512 ms, typical sleep duration
01010 = 1 sec, typical sleep duration
01011 = 2 sec, typical sleep duration
01100 = 4 sec, typical sleep duration
01101 = 8 sec, typical sleep duration
01110 = 16 sec, typical sleep duration
01111 = 32 sec, typical sleep duration
10000 = 64 sec, typical sleep duration
10001 = 128 sec, typical sleep duration
10010 = 256 sec, typical sleep duration
10011 = Reserved. Results in 1 ms sleep duration.
...
11111 = Reserved. Results in 1 ms sleep duration.
CLKSEL: Oscillator Selection bit
1 = Internal oscillator runs at 32 MHz
Decreases response time
Increases power consumption
Valid VDD operating range when selected is 2.5V-3.6V
0 = Internal oscillator runs at 16 MHz
Decreases response time
Increases power consumption
Valid VDD operating range when selected is 1.8V-3.6V
DS41668A-page 16
Preliminary
 2012 Microchip Technology Inc.