XA-H4 NXP Semiconductors, XA-H4 Datasheet - Page 33

• Manufacturer Part Number: XA-H4
• Description: The powerful 16-bit XA CPU core and rich feature set make the XA-H3 and XA-H4 devices ideal for high-performance real-time applications such as industrial control and networking
• Manufacturer: NXP Semiconductors

Philips Semiconductors
1999 Sep 24
CAS (BHE/BLE)
CAS (BHE/BLE)
RAS (CS)
Single-chip 16-bit microcontroller
D[15:0]
ClkOut
RAS (CS)
OE
ClkOut
A
OE
4 Byte Fetch (1 Word = 2 Bytes) is shown on 16-bit bus, burst can be 2 to 16 bytes (1 to 8 words).
D
A
Driven by XA
t
CHAV
t
t
CHAV
AVSL
t
RAS ADDRESS
AVSL
RAS ADDRESS
t
CHSL
t
CHAH
t
Note 3
CHSL
t
CHAH
Figure 11. DRAM EDO Burst Code Fetch on 16-Bit Bus
Driven by Slave Device
t
Figure 10. DRAM Single Read Cycle
CHAV
t
AVSL
t
CHAV
CAS ADDRESS
t
AVSL
CAS ADDRESS
t
CHSL
t
CHAH
t
CHSL
33
t
DIS
Word (from CAS Addr)
t
DIS
t
CHSH
t
CHAV
t
CPWH
VALID DATA
t
CHSH
Note 4
CAS ADDRESS +2
t
CHAH
t
CPWL
t
t
DIH
CHSH
Note 2
t
OHDE
Word (from CAS Addr +2)
t
DIS
Preliminary specification
t
CHSH
Note 4
t
OHDE
XA-H4
SU01279
SU01280