參數(shù)資料
型號: XA-H4
廠商: NXP Semiconductors N.V.
英文描述: Single-chip 16-bit microcontroller
中文描述: 單片16位微控制器
文件頁數(shù): 33/42頁
文件大?。?/td> 225K
代理商: XA-H4
Philips Semiconductors
Preliminary specification
XA-H4
Single-chip 16-bit microcontroller
1999 Sep 24
33
SU01279
t
CHSL
t
CHSH
D
OE
CAS (BHE/BLE)
RAS (CS)
A
t
CHAV
ClkOut
t
AVSL
t
CHAV
CAS ADDRESS
RAS ADDRESS
t
CHAH
t
CHSL
t
AVSL
t
CHSH
VALID DATA
t
DIS
t
DIH
Note 2
t
OHDE
Figure 10. DRAM Single Read Cycle
SU01280
t
CHSL
t
CHSH
D[15:0]
OE
CAS (BHE/BLE)
RAS (CS)
A
t
CHAV
ClkOut
t
AVSL
t
CHAV
CAS ADDRESS
RAS ADDRESS
t
CHAH
t
CHSL
t
AVSL
t
CPWH
t
OHDE
Note 4
CAS ADDRESS +2
t
CHSH
Note 4
t
DIS
t
DIS
t
CPWL
t
CHAV
Note 3
Driven by Slave Device
Driven by XA
Word (from CAS Addr)
Word (from CAS Addr +2)
t
CHAH
t
CHAH
4 Byte Fetch (1 Word = 2 Bytes) is shown on 16-bit bus, burst can be 2 to 16 bytes (1 to 8 words).
Figure 11. DRAM EDO Burst Code Fetch on 16-Bit Bus
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