ST92F150-DBE STMicroelectronics, ST92F150-DBE Datasheet - Page 146

• Manufacturer Part Number: ST92F150-DBE
• Description: MCU, MPU & DSP Development Tools ST9 Dedication Board
• Manufacturer: STMicroelectronics

Specifications of ST92F150-DBE

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ST92F124/F150/F250 - EXTERNAL MEMORY INTERFACE (EXTMI)
EXTERNAL MEMORY SIGNALS (Cont’d)
Figure 77. Effects of DS2EN on the behavior of DS and DS2
n
146/429
9
SYSTEM
CLOCK
AS (MC=0)
ALE (MC=1)
DS
(MC=0)
DS2
(MC=0)
OEN
(MC=1, READ)
OEN
(MC=1, WRITE)
OEN2
(MC=1)
DS
(MC=0)
DS2
(MC=0)
OEN
(MC=1)
OEN2
(MC=1, READ)
(MC=1, READ)
OEN2
(MC=1, WRITE)
(MC=1, WRITE)
DS2EN=0 OR (DS2EN=1 AND UPPER MEMORY ADDRESSED):
DS2EN=1 AND LOWER MEMORY ADDRESSED:
T1
NO WAIT CYCLE
T2
T1
1 DS WAIT CYCLE
DS STRETCH
T2