Instruction Set
926
SPNU503C – March 2018
Copyright © 2018, Texas Instruments Incorporated
High-End Timer (N2HET) Module
20.6.3.10 DJZ (Decrement and Jump if Zero)
DJNZ is also a supported syntax. The functionality of the two instruction names is identical.
Syntax
DJZ {
[brk={OFF | ON}]
[next={label | 9-bit unsigned integer}]
[reqnum={3-bit unsigned integer}
[request={NOREQ | GENREQ | QUIET}]
[control={OFF | ON}]
[cond_addr={label | 9-bit unsigned integer}]
[reg={A | B | T | NONE}]
[irq={OFF | ON}]
[data={25-bit unsigned integer]
}
Figure 20-141. DJZ Program Field (P31:P0)
31
26 25
23
22
21
13 12
9
8
7
6
5
0
0
Request
Number
BRK
Next program address
1010
Res.
10
Reserved
6
3
1
9
4
1
2
6
Figure 20-142. DJZ Control Field (C31:C0)
31
29
28
27
26
25
22
21
16
Reserved
Request type
Control
Reserved
Conditional address
3
2
1
4
9
15
13
12
8
7
3
2
1
0
Conditional address
Reserved
Register select
Int. ena
9
10
2
1
Figure 20-143. DJZ Data Field (D31:D0)
31
7
6
0
Data
Reserved
25
7
Cycles
One
Register modified
Selected register (A, B, or T)
Description
This instruction defines a virtual down counter used for delayed execution of
certain instructions (to generate minimum on/off times). When DJZ is
executed with counter value not zero, the counter value is decremented. If the
counter value is zero, the counter remains zero until it is reloaded with a non-
zero value. The program flow can be modified when down counter value is
zero by using the conditional address.
