CP3BT23_14 Datasheet, PDF (88/324 Pages) Texas Instruments – CP3BT23 Reprogrammable Connectivity Processor with Bluetooth and Dual CAN Interfaces

CP3BT23
SNOSCX3A – JULY 2013 – REVISED JANUARY 2014
www.ti.com
13.1.12 Wake-Up 1 Pending Register (WK1PND)
The WK1PND register is a word-wide read/write register in which the Multi-Input Wake-Up module latches
any detected trigger conditions. The CPU can only write a 1 to any bit position in this register. If the CPU
attempts to write a 0, it has no effect on that bit. To clear a bit in this register, the CPU must use the
WK1PCL register. This implementation prevents a potential hardware-software conflict during a read-
modify-write operation on the WK1PND register.
This register is cleared upon reset. The register format is shown below.
15
0
WKPD
WKPD
The Wake-Up Pending bits indicate which MIWU channels have been triggered. The
WKPD15:0 bits correspond to the WUI31:15 channels. Writing 1 to a bit sets it.
0 – Trigger condition did not occur.
1 – Trigger condition occurred.
13.1.13 Wake-Up Pending Clear Register (WK0PCL)
The WK0PCL register is a word-wide write-only register that lets the CPU clear bits in the WKPND
register. Writing a 1 to a bit position in the WKPCL register clears the corresponding bit in the WKPND
register. Writing a 0 has no effect. Do not modify this register with instructions that access the register as
a read-modify-write operand, such as the bit manipulation instructions.
Reading this register location returns undefined data. Therefore, do not use a read-modify-write sequence
(such as the SBIT instruction) to set individual bits. Do not attempt to read the register, then perform a
logical OR on the register value. Instead, write the mask directly to the register address. The register
format is shown below.
15
0
WKCL
WKCL
Writing 1 to a bit clears it.
0 – Writing 0 has no effect.
1 – Writing 1 clears the corresponding bit in the WKPD register.
88
Multi-Input Wake-Up
Submit Documentation Feedback
Product Folder Links: CP3BT23
Copyright © 2013–2014, Texas Instruments Incorporated