Texas Instruments 28xxx manual 17. Trip-Zone Select Register TZSEL, Submit Documentation Feedback

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Trip-Zone Submodule Control and Status Registers

Figure 4-17. Trip-Zone Select Register (TZSEL)

15	14	13	12	11	10	9	8
Reserved		OSHT6	OSHT5	OSHT4	OSHT3	OSHT2	OSHT1
R-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
Reserved		CBC6	CBC5	CBC4	CBC3	CBC2	CBC1
R-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; -n = value after reset

Table 4-17. Trip-Zone Submodule Select Register (TZSEL) Field Descriptions

Bits Name Value Description

One-Shot (OSHT) Trip-zone enable/disable. When any of the enabled pins go low, a one-shot trip event occurs for this ePWM module. When the event occurs, the action defined in the TZCTL register (Table 4-18) is taken on the EPWMxA and EPWMxB outputs. The one-shot trip condition remains latched until the user clears the condition via the TZCLR register (Table 4-21).

15:14	Reserved	Reserved
13	OSHT6	Trip-zone 6 (TZ6) Select
	0	Disable TZ6 as a one-shot trip source for this ePWM module.
	1	Enable TZ6 as a one-shot trip source for this ePWM module.
12	OSHT5	Trip-zone 5 (TZ5) Select
	0	Disable TZ5 as a one-shot trip source for this ePWM module
	1	Enable TZ5 as a one-shot trip source for this ePWM module
11	OSHT4	Trip-zone 4 (TZ4) Select
	0	Disable TZ4 as a one-shot trip source for this ePWM module
	1	Enable TZ4 as a one-shot trip source for this ePWM module
10	OSHT3	Trip-zone 3 (TZ3) Select
	0	Disable TZ3 as a one-shot trip source for this ePWM module
	1	Enable TZ3 as a one-shot trip source for this ePWM module
9	OSHT2	Trip-zone 2 (TZ2) Select
	0	Disable TZ2 as a one-shot trip source for this ePWM module
	1	Enable TZ2 as a one-shot trip source for this ePWM module
8	OSHT1	Trip-zone 1 (TZ1) Select
	0	Disable TZ1 as a one-shot trip source for this ePWM module
	1	Enable TZ1 as a one-shot trip source for this ePWM module

Cycle-by-Cycle (CBC) Trip-zone enable/disable. When any of the enabled pins go low, a cycle-by-cycle trip event occurs for this ePWM module. When the event occurs, the action defined in the TZCTL register (Table 4-18) is taken on the EPWMxA and EPWMxB outputs. A cycle-by-cycle trip condition is automatically cleared when the time-base counter reaches zero.

7:6	Reserved	Reserved
5	CBC6	Trip-zone 6 (TZ6) Select
	0	Disable TZ6 as a CBC trip source for this ePWM module
	1	Enable TZ6 as a CBC trip source for this ePWM module
4	CBC5	Trip-zone 5 (TZ5) Select
	0	Disable TZ5 as a CBC trip source for this ePWM module
	1	Enable TZ5 as a CBC trip source for this ePWM module
3	CBC4	Trip-zone 4 (TZ4) Select
	0	Disable TZ4 as a CBC trip source for this ePWM module
	1	Enable TZ4 as a CBC trip source for this ePWM module
2	CBC3	Trip-zone 3 (TZ3) Select
	0	Disable TZ3 as a CBC trip source for this ePWM module
	1	Enable TZ3 as a CBC trip source for this ePWM module
SPRU791D–November 2004–Revised October 2007			Registers 107
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