EasyManuals Logo

ZiLOG Z8 User Manual

ZiLOG Z8
220 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #171 background imageLoading...
Page #171 background image
Z8 Microcontrollers
ZiLOG Instruction Descriptions and Formats
UM001601-0803 12-31
HALT
HALT
HALT
Halt
HALT
Instruction Format:
Operation:
The HALT instruction turns off the internal CPU clock, but not the XTAL oscillation. The counter/timers and the
external interrupts IRQ1, IRQ2, and IRQ3 remain active. The devices are recovered by interrupts, either externally
or internally generated.
Note:
In order to enter HALT mode, it is necessary to first flush the instruction pipeline to avoid suspending execution in
mid-instruction. The user must execute a NOP immediately before the execution of the HALT instruction.
Example:
Assuming the Z8 is in normal operation, the statements:
NOP
HALT
Op Codes: FF 7F
place the Z8 into HALT mode.
Flags: C: Unaffected
Z: Unaffected
S: Unaffected
V: Unaffected
D: Unaffected
H: Unaffected

Table of Contents

Other manuals for ZiLOG Z8

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the ZiLOG Z8 and is the answer not in the manual?

ZiLOG Z8 Specifications

General IconGeneral
BrandZiLOG
ModelZ8
CategoryDesktop
LanguageEnglish

Related product manuals