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ST90R158 Datasheet(PDF) 84 Page - STMicroelectronics

Part # ST90R158
Description  8/16-BIT MCU FAMILY WITH UP TO 64K ROM/OTP/EPROM AND UP TO 2K RAM
PDF  190 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST90R158 Datasheet(HTML) 84 Page - STMicroelectronics

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ST90158 - EXTERNAL MEMORY INTERFACE (EXTMI)
EXTERNAL MEMORY SIGNALS (Cont’d)
Figure 45. External memory Read/Write with a programmable wait
n
AS STRETCH
DS STRETCH
ADDRESS
ADDRESS
ADDRESS
ADDRESS
DATA IN
DATA IN
DATA OUT
DATA
T1
T2
T1
T2
TWA
TWD
NO WAIT CYCLE
1 AS WAIT CYCLE
1 DS WAIT CYCLE
AS (MC=0)
ALE (MC=1)
P1
DS (MC=0)
P0
MULTIPLEXED
RW (MC=0)
DS (MC=1)
RW (MC=1)
P0
MULTIPLEXED
RW (MC=0)
DS (MC=1)
RW (MC=1)
ADDRESS
ADDRESS
TAVQV
TAVWH
TAVWL
SYSTEM
CLOCK
9



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