CHAPTER 19 FLASH MEMORY VERSION
330
User’s Manual U15331EJ4V1UD
19.2 Cautions on
µ
PD78F9488 and 78F9489
(1) When using HALT mode with subclock multiplied by four
Observe the following constraints when using the flash version (
µ
PD78F9488 and 78F9489) in the HALT
mode with the subclock multiplied by 4 as the CPU clock.
•
Be sure to insert the following number of NOP instructions immediately after the HALT instruction.
Operating Temperature
Number of NOP Instructions
T
A
=
−
40 to +45
°
C 2
T
A
=
−
40 to +80
°
C 3
T
A
=
−
40 to +85
°
C 4
•
Save the value of the A register to the internal high-speed RAM area before the HALT instruction is
executed (because the value of the A register may be changed when the HALT mode is released).
Содержание PD789488
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