W78958B Datasheet, PDF (22/28 Pages) Winbond – 8-BIT EMULATION MICROCONTROLLER

W78958B
Program Fetch Cycle in Standard Type (Example: W78C52)
XTAL1
ALE
S1 S2 S3 S4 S5 S6 S1 S2 S3 S4 S5 S6
Internal (address: 0 ~ 1FFFH) program fetch:
IPSEN
PSEN
AP6<4:0>
AP5<7:0>
DP4<7:0>
Internal
Read
Strobe
T_APL
address
T_ADV
addr
code
External (address: 2000H ~ 0FFFFH) program fetch:
IPSEN
PSEN
P2<7:0>
P0<7:0>
Internal
Read
Strobe
T_APL
address
T_ADV
address
code
(High)
(High)
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