HET[0]
HET[1]
N2HET
HR 0
N2HET
HR 1
0
1
HR share 1/0
N2HET Functional Description
808
SPNU503C – March 2018
Copyright © 2018, Texas Instruments Incorporated
High-End Timer (N2HET) Module
20.2.5.5 HR Structures Sharing (Input)
The HR Share Control Register (HETHRSH) allows two HR structures to share the same pin
for input
capture only
. If these bits are set, the HR structures N and N+1 are connected to pin N. In this structure,
pin N+1 remains available for general-purpose input/output. See
Figure 20-12. Example of HR Structure Sharing for N2HET Pins 0/1
The following program gives an example how the HR share feature (HET[0] HR structure and HET[1] HR
structure shared) can be used for the PCNT instruction:
L00 PCNT { next=L01, type=rise2fall, pin=0 }
L01 PCNT { next=L00, type=fall2rise, pin=1 }
The HET[1] HR structure is also connected to the HET[0] pin. The L00_PCNT data field is able to capture
a high pulse and the L01_PCNT captures a low pulse on the
same
pin (N2HET [0] pin).
