Texas Instruments TMS570LC4357

Instruction Set www.ti.com
1086
SPNU563A–March 2018
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High-End Timer (N2HET) Module
23.6.3.8 CNT (Count)
Syntax CNT {
[brk={OFF | ON}]
[next={label | 9-bit unsigned integer}]
[reqnum={3-bit unsigned integer}]
[request={NOREQ | GENREQ | QUIET}]
[angle_count={OFF | ON}]
[reg={A | B | T | NONE}]
[comp ={EQ | GE}]
[irq={OFF | ON}]
[control={OFF | ON}]
max={25-bit unsigned integer}
[data={25-bit unsigned integer]
}
Figure 23-134. CNT Program Field (P31:P0)
31 26 25 23 22 21 13 12 9 8 7 6 5 4 1 0
0 Request
Number
BRK Next program address 0110 Angle
count
Register Comp.
select
Res. Int. ena
6 3 1 9 4 1 2 1 4 1
Figure 23-135. CNT Control Field (C31:C0)
31 29 28 27 26 25 24 0
Res. Request
type
Control Res. Max Count
3 2 1 1 25
Figure 23-136. CNT Data Field (D31:D0)
31 7 6 0
Data Reserved
25 7
Cycles One or two
One cycle (time mode), two cycles (angle mode)
Register modified Selected register (A, B or T)
Description This instruction defines a virtual timer. The counter value stored in the data
field [D31:7] is incremented unconditionally on each execution of the
instruction when in time mode (angle count bit [P8] = 0). When the count
reaches the maximum count specified in the control field, the counter is reset.
It takes one cycle in this mode.
In angle mode (angle count bit [P8] = 1), CNT needs data from the software
angle generator (SWAG). When in angle count mode the angle increment
value will be 0 or 1. It takes two cycles in this mode.