W78958B Datasheet, PDF (19/28 Pages) Winbond – 8-BIT EMULATION MICROCONTROLLER

W78958B
Program Fetch Cycle in Advanced Type
PARAMETER
SYMBOL
Address Valid to PSEN Low
TAPL
PSEN Low to Data Valid
TPDV
MIN.
2 TCP
-
TYP.
-
-
MAX.
-
2 TCP
UNIT
nS
nS
Data Memory Read/Write Cycle in Advanced Type
PARAMETER
SYMBOL
MIN.
Address Valid to RD Low
TARL
4 TCP
RD Low to Data Valid
TRDV
-
Data Hold After RD High
TRDQ
0
RD Pulse Width
TRS
6 TCP-∆
Address Valid to WR Low
TAWL
4 TCP
Data Valid to WR Low
TDWL
1 TCP
Data Hold After WR High
TWDQ
1 TCP
WR Pulse Width
TWS
6 TCP-∆
Note: "∆" (due to buffer driving delay and wire loading) is 20 nS.
TYP.
-
-
-
6 TCP
-
-
-
6 TCP
Program Fetch Cycle in Standard Type
PARAMETER
SYMBOL
Address Valid to PSEN Low
TAPL
Address Valid to Data Valid
TADV
MIN.
2 TCP
-
TYP.
-
-
MAX.
4 TCP+∆
4 TCP
2 TCP
-
4 TCP+∆
-
-
-
UNIT
nS
nS
nS
nS
nS
nS
nS
nS
MAX.
-
4 TCP
UNIT
nS
nS
Emulation Mode Cycle (Internal SFR/PC/RAM Access Only)
PARAMETER
SYMBOL MIN.
TYP.
Address Valid to ICESET Set
TAIS
-
-
Address Valid to EMU High
TAUH
-
6 TCP
ICESET Low to Emulation Mode Re-exit
TIER
-
-
ICESET Low to EMU Low
TIUL
-
-
Emu. Address Valid to AP7<1> Low
TEARL
25
-
AP7<1> Low to Data Valid
TERDV
-
25
MAX.
6 TCP-50
-
3 TCP
11 TCP
-
-
UNIT
nS
nS
nS
nS
nS
nS
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Publication Release Date: September 1997
Revision A3