W78958B Datasheet, PDF (27/28 Pages) Winbond – 8-BIT EMULATION MICROCONTROLLER

Standard Type Application in Emulation Mode
W78958B
ICE_BREAKPOINT
_LOGIC
EA
ENSTD
ICESET
EMU
P1<7:0>
P3<7:0>
DP4<7:0>
AP5<7:0>
AP6<0>
AP7<0>
AP7<1>
<7:0>
<8>
P0<7:0>
P2<7:0>
ALE
<7:0>
<15:8>
PSEN
ESEL
<7> (RD)
<6> (WR)
ICE_CONTROL_LOGIC
EMU_ALE
ROM_RD
RAM_RD
RAM_WR
SEL1
EMU_DB<7:0>
EMU_ADDR<8:0>
INT_WR
INT_RD
64KB
ROM
OE
64KB
RAM
OE WR
EMU_ADDR<15:0>
EMU_DB<7:0>
INT_WR
INT_RD
ESEL
SEL1 SEL0
Access Space
ESEL AP6<0>
0
0
SFR/PC 80 - FF
0
0
0
1
Internal RAM 0 - FF
0
1
1
0
ROM
0 - FFFFF
1
-
1
1
RAM
0 - FFFF
1
-
Note: When ESEL = 1, ALE and PSEN are high-impedence.
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Publication Release Date: September 1997
Revision A3