Rohm Kionix KX132-1211, Technical Reference Manual

Page: 40 / 73

± 2g / 4g / 8g / 16g Tri-axis Digital
Accelerometer Technical
Reference Manual
PART NUMBER:
KX132-1211
Rev. 1.0
31-Jul-2019
36 Thornwood Dr. – Ithaca, NY 14850 © 2019 Kionix – All Rights Reserved
tel: 607-257-1080 – fax:607-257-1146 893-12874-1907311402-0.17
www.kionix.com - info@kionix.com Page 40 of 73
1.21 WAKE-UP & BACK-TO-SLEEP THRESHOLD AND COUNTER SETUP REGISTERS
(0x49
– 0x4D)
The threshold and counter values of the Wake-up and Back-to-Sleep engines of the KX132-1211 can be configured via
registers 0x49
– 0x4D. See
Motion Interrupt Feature Description section for additional details on how to configure these
registers. These registers are On-The-Fly (OTF) registers and can be written to while the KX132-1211 is enabled (PC1
bit
in CNTL1 register is set to “1”) and the change will be accepted with no interruption in the operation.
WUFTH, BTSWUFTH, BTSTH
Wake-up/Back-to-sleep engine thresholds. See Equation 7 in Motion Interrupt Feature Description section for details
on how to configure these registers.
R/W R/W R/W R/W R/W R/W R/W R/W Address Register Reset Value
WUFTH7 WUFTH6 WUFTH5 WUFTH4 WUFTH3 WUFTH2 WUFTH1 WUFTH0 0x49 WUFTH 10000000
0 BTSTH10 BTSTH9 BTSTH8 0 WUFTH10 WUFTH9 WUFTH8 0x4A BTSWUFTH 00000000
BTSTH7 BTSTH6 BTSTH5 BTSTH4 BTSTH3 BTSTH2 BTSTH1 BTSTH0 0x4B BTSTH 10000000
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
WUFTH<10:0>
– Wake-Up Function Threshold (WUFTH)
value
BTSTH<10:0>
– Back-To-Sleep function Threshold
(BTSTH) value
BTSC
Debounce counter register for the Back-to-Sleep (BTS) engine. See Equation 5 in Motion Interrupt Feature Description
section for details on how to configure this register.
R/W R/W R/W R/W R/W R/W R/W R/W
BTSC7 BTSC6 BTSC5 BTSC4 BTSC3 BTSC2 BTSC1 BTSC0 Reset Value
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 00000000
Address: 0x4C
WUFC
Debounce counter register for the Wake-up Function (WUF) engine. See Equation 5 in Motion Interrupt Feature
Description section for details on how to configure this register.
R/W R/W R/W R/W R/W R/W R/W R/W
WUFC7 WUFC6 WUFC5 WUFC4 WUFC3 WUFC2 WUFC1 WUFC0 Reset Value
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 00000000
Address: 0x4D