CONTROL_MODULE Registers
9.3.54 vtp_ctrl Register (offset = E0Ch) [reset = 0h]
vtp_ctrl is shown in
and described in
Figure 9-57. vtp_ctrl Register
31
30
29
28
27
26
25
24
Reserved
R-0h
23
22
21
20
19
18
17
16
Reserved
pcin
R-0h
R-0h
15
14
13
12
11
10
9
8
Reserved
ncin
R-0h
R-0h
7
6
5
4
3
2
1
0
Reserved
enable
ready
lock
filter
clrz
R-0h
R/W-0h
R-0h
R/W-0h
R/W-0h
R/W-0h
LEGEND: R/W = Read/Write; R = Read only; W1toCl = Write 1 to clear bit; -n = value after reset
Table 9-64. vtp_ctrl Register Field Descriptions
Bit
Field
Type
Reset
Description
31-23
Reserved
R
0h
22-16
pcin
R
1h
Default/reset values of 'P' for the VTP controller.
See "Silicon Revision Functional Differences and Enhancements" for
differences in operation based on AM335x silicon revision.
15
Reserved
R
0h
14-8
ncin
R
1h
Default/reset values of 'N' for the VTP controller.
See "Silicon Revision Functional Differences and Enhancements" for
differences in operation based on AM335x silicon revision.
7
Reserved
R
0h
6
enable
R/W
0h
0: VTP macro in bypass mode. P and N are driven from PCIN and
NCIN.
1: Dynamic VTP compensation mode
5
ready
R
0h
0: Training sequence is not complete
1: Training sequence is complete
4
lock
R/W
0h
0: Normal operation dynamic update
1: freeze dynamic update, pwrdn controller
3-1
filter
R/W
0h
Digital filter bits to prevent the controller from making excessive
number of changes.
000: Filter off
001: Update on two consecutive update requests
010: Update on three consecutive update requests
011: Update on four consecutive update requests
100: Update on five consecutive update requests
101: Update on six consecutive update requests
110: Update on seven consecutive update requests
111: Update on eight consecutive update requests
0
clrz
R/W
0h
clears flops, start count again, after low going pulse
818
Control Module
SPRUH73H – October 2011 – Revised April 2013
Copyright © 2011–2013, Texas Instruments Incorporated