CY8C38_11 CYPRESS [Cypress Semiconductor], CY8C38_11 Datasheet - Page 23

• Manufacturer Part Number: CY8C38_11
• Manufacturer: CYPRESS [Cypress Semiconductor]

5.6 External Memory Interface
CY8C38 provides an EMIF for connecting to external memory
devices. The connection allows read and write accesses to
external memories. The EMIF operates in conjunction with
UDBs, I/O ports, and other hardware to generate external
memory address and control signals. At 33 MHz, each memory
access cycle takes four bus clock cycles.
block diagram. The EMIF supports synchronous and
asynchronous memories. The CY8C38 supports only one type
of external memory device at a time. External memory can be
accessed through the 8051 xdata space; up to 24 address bits
can be used. See
memory can be 8 or 16 bits wide.
Document Number: 001-11729 Rev. *R
PHUB
“xdata Space”
Data,
and Control
Signals
Data,
Signals
Data,
and Control
Signals
Address,
Address,
and Control
Address,
section on page 25. The
Figure 5-1
IO IF
EM Control
Signals
Figure 5-1. EMIF Block Diagram
is the EMIF
EMIF
UDB
Data Signals
Address Signals
Control Signals
Signals
Other
Control
DSI to Port
Control
DSI Dynamic Output
PORTs
PORTs
PORTs
I/O
I/O
I/O
PSoC
External _ MEM_ ADDR [23:0]
External _ MEM_ DATA[15:0]
®
3: CY8C38 Family
Control
Data Sheet
Page 23 of 129
[+] Feedback