User's Manual

MSM80C154S/83C154S/85C154HVS
168
Figure 4-68 Hard power down mode setting andl/Of loating time chart (external ROM mode)
S1 S2 S3 S4 S5 S6
M1 or M2 M1
XTAL1
1 0
ALE
1 0
PSEN PORT 0 PORT 1 PORT 2 PORT 3 PCON-bit 6
1 0
HARD POWER DOWN MODE
S6
HPD SET CYCLE
1 0 1 0
IOCON-bit 0
*ALF=“1”
S1
*HPDI [P3.5]
1 0
1 0 1 0 1 0
PORT DATA PORT DATA
FLOATING FLOATING FLOATING FLOATING
PCLPCL PCL
PCH PCHPCH
PORT DATA
1 0