ZiLOG Z80380 User Manual page 96

Z
ILOG
HALT
HALT
HALT
Operation: CPU Halts
The CPU operation is suspended until either an interrupt request or reset request is
received. This instruction is used to synchronize the CPU with external events, preserving
its state until an interrupt or reset request is accepted. After an interrupt is serviced, the
instruction following HALT is executed. While the CPU is halted, memory refresh cycles still
occur, and bus requests are honored. When this instruction is executed the signal /HALT
is asserted and remains asserted until an interrupt or reset request is accepted.
Flags: S: Unaffected
Z: Unaffected
H: Unaffected
V: Unaffected
N: Unaffected
C: Unaffected
Addressing
Mode Syntax
HALT
5-62
Instruction Format
01110110
Execute
Time
2
Z380
U ' M
SER S ANUAL
Note
DC-8297-03
™