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ST90135 数据表(PDF) 83 Page - STMicroelectronics

部件名 ST90135
功能描述  8/16-BIT MCU FAMILY WITH UP TO 64K ROM/OTP/EPROM AND UP TO 2K RAM
PDF  190 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

ST90135 数据表(HTML) 83 Page - STMicroelectronics

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ST90158 - EXTERNAL MEMORY INTERFACE (EXTMI)
EXTERNAL MEMORY SIGNALS (Cont’d)
Figure 44. Effects of DS2EN on the behavior of DS and DS2
n
DS STRETCH
T1
T2
T1
T2
NO WAIT CYCLE
1 DS WAIT CYCLE
SYSTEM
AS (MC=0)
DS2EN=0 OR (DS2EN=1 AND UPPER MEMORY ADDRESSED):
DS2EN=1 AND LOWER MEMORY ADDRESSED:
DS
DS
DS
DS2
(MC=1, READ)
(MC=1, WRITE)
(MC=0)
DS
DS2
(MC=0)
DS2
(MC=1, READ)
DS2
(MC=1, WRITE)
CLOCK
9



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