Figure 8-3. “MOVX A,@DPTR” without Stretch
1
2
3
4
5
6
7
System
Clock
Weak
High-byte Address
P2
P0
Pulled Up
Weak
Pulled Up
Low-byte Addr.
Data
ALE
/RD
(P3.7)
MOVX Read Cycle
{ALES1,ALES0}={0,0} & {RWS2,RWS1,RWS0}={0,0,0}
Figure 8-4. “MOVX A,@DPTR” with Stretch
1
2
3
4
5
6
7
8
9
10
11
12
13
14
System
Clock
Weak
Pulled Up
High-byte Address
P2
Weak
Pulled Up
Low-byte Address
Data
P0
ALE
/RD
(P3.7)
Stretched
Setup-time:
2 Clocks
Stretched
Hold-time:
2 Clocks
Stretched
Write-pulse:
3 Clocks
MOVX Read Cycle
{ALES1,ALES0}={1,0} & {RWS2,RWS1,RWS0}={0,1,1}
MEGAWIN
MPC82G516A Data Sheet
34
MEGAWIN [ MEGAWIN TECHNOLOGY CO., LTD ]
