Texas Instruments TMS570LC4357

N2HET Control Registers www.ti.com
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SPNU563A–March 2018
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High-End Timer (N2HET) Module
23.4.32 Loop Back Pair Direction Register (HETLBPDIR)
Refer to Section 23.2.5.7 for a description of loopback test functions.
N2HET1: offset = FFF7 B890h; N2HET2: offset = FFF7 B990h
Figure 23-87. Loop Back Pair Direction Register (HETLBPDIR)
31 20 19 16
Reserved LBPTSTENA
R-0 R/WP-5h
15 14 13 12 11 10 9 8
LBPDIR31/30 LBPDIR29/28 LBPDIR27/26 LBPDIR25/24 LBPDIR23/22 LBPDIR21/20 LBPDIR19/18 LBPDIR17/16
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
7 6 5 4 3 2 1 0
LBPDIR15/14 LBPDIR13/12 LBPDIR11/10 LBPDIR9/8 LBPDIR7/6 LBPDIR5/4 LBPDIR3/2 LBPDIR1/0
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
LEGEND: R/W = Read/Write; R = Read only; WP = Write in privileged mode only; -n = value after reset
Table 23-49. Loop Back Pair Direction Register (HETLBPDIR) Field Descriptions
Bit Field Value Description
31-20 Reserved 0 Reads return 0. Writes have no effect.
19-16 LBPTSTENA Loopback Test Enable Key
5h Loopback Test is disabled.
Ah Loopback Test is enabled.
Others Loopback Test is disabled.
15-0 LBPDIR
n+1 / n
Loop Back Pair Direction Bits
0 The HR structures on pins HET[n+1] and HET[n] are internally connected with HET[n] as input and
HET[n+1] as output.
1 The HR structures on pins HET[n+1] and HET[n] connected with HET[n] as output and HET[n+1]
as input.
NOTE: The loop back direction can be selected independent on the HETDIR register setting.