SD60C31 Datasheet, PDF (10/12 Pages) AUK corp – CMOS SINGLE-COMPONENT 8-BIT MICROCOMPUTER

Timing Diagram(Continued)
SD60C31/P SD60C51/P
ALE
PSEN
WR
PORT0
PORT2
tWHLH
tLLWL
tAVLL
tLLAX
A0 - A7
FROM RI OR DPL
tAVWL
tWLWH
tQVWX
DATA OUT
P2.0 - P2.7 OR A8 - A15 FROM DPH
tWHQX
A0 - A7 FROM PCL
INSTR IN
A0 - A15 FROM PCH
Figure 3. External Data Memory Write Cycle
VCC^{- 0.5}
0.45V
0.7VCC
0.2VSS^-0.1
tCHCL
tCLCX
tCHCX
tCLCH
tCLCL
Figure 4. Ex ternal Clock Drive
-0.5
VCC
0.2VCC^+0.9
0.45V
0.2VCC^-0.1
NOTE :
AC Inputs during testing are driv en at V CC-0.5 for a logic
'1' and 0.45V for a logic '0'. Timing measurements are
made at V IH min for a logic '1' and V IL for a logic '0'
Figure 5. AC T es ting Input/ Output
VLOAD
+ 0.1V
VLOAD+
- 0.1V
VLOAD
TIMING
REFERENCE
POINTS
VOH^{- 0.1V}
VOL^{+ 0.1V}
NOTE :
For timing purposes, a port is no longer floating when a
100mV change from load v oltage occurs, and begings
to float when a 100mV change from the loaded V OH /V OL
level occurs.
IOH/IOL ≥± 20mA
Figure 6. Float Waveform
KSI-W001-000
10