30Mar98@15:00h
Semiconductor Group
97
Version 1.2, 12.97
C166 Family Instruction Set
Instruction Description
PWRDN
Enter Power Down Mode
PWRDN
Syntax
PWRDN
Operation
Enter Power Down Mode
Description
This instruction causes the part to enter the power down mode. In this
mode, all peripherals and the CPU are powered down until the part is
externally reset. To insure that this instruction is not accidentally exe-
cuted, it is implemented as a protected instruction. To further control the
action of this instruction, the PWRDN instruction is only enabled when the
non-maskable interrupt pin (NMI) is in the low state. Otherwise, this
instruction has no effect.
E Not affected.
Z Not affected.
V Not affected.
C Not affected.
N Not affected.
Addressing Modes
Mnemonic
Format
Bytes
PWRDN
97 68 97 97
4
Condition Flags
E
Z
V
C
N
-
-
-
-
-