ST92T163R4D0 查看數據表（PDF） - STMicroelectronics

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ST92T163R4D0

8/16-BIT FULL SPEED USB MCU FOR COMPOSITE DEVICES WITH 16 ENDPOINTS, 20K ROM, 2K RAM, I2C, SCI, & MFT

STMicroelectronics 

ST92163 - EXTERNAL MEMORY INTERFACE (EXTMI)

EXTERNAL MEMORY SIGNALS (Cont’d)

Figure 50. Effects of DS2EN on the behavior of DS and DS2

n

NO WAIT CYCLE

T1

T2

1 DS WAIT CYCLE

T1

T2

SYSTEM

CLOCK

AS (MC=0)

DS STRETCH

DS2EN=0 OR (DS2EN=1 AND UPPER MEMORY ADDRESSED):

DS

(MC=0)

DS

(MC=1, READ)

DS

(MC=1, WRITE)

DS2

DS2EN=1 AND LOWER MEMORY ADDRESSED:

DS

DS2

(MC=0)

DS2

(MC=1, READ)

DS2

(MC=1, WRITE)

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