W79E217A Datasheet, PDF (194/207 Pages) Winbond – 8-bit Microcontroller

Preliminary W79E217A Data Sheet
AC Specification, continued
PARAMETER
SYMBOL
VARIABLE
CLOCK
MIN.
Port 2 Address to Valid Instr. In
t_AVIV2
PSEN Low to Address Float
t_PLAZ
0
Data Hold After Read
Data Float After Read
t_RHDX
0
t_RHDZ
RD Low to Address Float
t_RLAZ
Note:
1. CPU executes the program stored in the internal APFlash at V_DD=5.0V
2. CPU executes the program stored in the external memory at V_DD=5.0V
VARIABLE
CLOCK
MAX.
3.5t_CLCL - 20
t_CLCL - 5
0.5t_CLCL - 5
UNITS
nS
nS
nS
nS
nS
25.3.3 MOVX Characteristics Using Stretch Memory Cycle
PARAMETER
SYMBOL
Data Access ALE Pulse Width t_LLHL2
Address Hold After ALE Low
for MOVX write
t_LLAX2
VARIABLE
CLOCK
MIN.
1.5t_CLCL - 5
2.0t_CLCL - 5
0.5t_CLCL - 5
VARIABLE
CLOCK
MAX.
UNITS
nS
nS
RD Pulse Width
WR Pulse Width
RD Low to Valid Data In
Data Hold after Read
Data Float after Read
t_RLRH
t_WLWH
t_RLDV
t_RHDX
t_RHDZ
ALE Low to Valid Data In
t_LLDV
Port 0 Address to Valid Data In t_AVDV1
ALE Low to RD or WR Low
Port 0 Address to RD or WR
Low
t_LLWL
t_AVWL
2.0t_CLCL - 5
t_MCS - 10
2.0t_CLCL - 5
t_MCS - 10
0
0.5t_CLCL - 5
1.5t_CLCL - 5
t_CLCL - 5
2.0t_CLCL - 5
nS
nS
2.0t_CLCL - 20
nS
t_MCS - 20
nS
t_CLCL - 5
nS
2.0t_CLCL - 5
2.5t_CLCL - 5
t_MCS + 2t_CLCL - ^nS
40
3.0t_CLCL - 20
nS
2.0t_CLCL - 5
0.5t_CLCL + 5
nS
1.5t_CLCL + 5
nS
STRECH
t_MCS = 0
t_MCS>0
t_MCS = 0
t_MCS>0
t_MCS = 0
t_MCS>0
t_MCS = 0
t_MCS>0
t_MCS = 0
t_MCS>0
t_MCS = 0
t_MCS>0
t_MCS = 0
t_MCS>0
t_MCS = 0
t_MCS>0
t_MCS = 0
t_MCS>0
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Publication Release Date: December 14, 2007
Revision A3.0