mcf5272 Freescale Semiconductor, Inc, mcf5272 Datasheet - Page 463

• Manufacturer Part Number: mcf5272
• Description: Mcf5272 Coldfire Integrated Microprocessor User
• Manufacturer: Freescale Semiconductor, Inc

MOTOROLA
bus widths. These memory devices have separate pins for independent byte strobes, write
enable, chip select, and output enable. All chip selects support this EBI mode.
The number of wait states required for the external memory or peripheral is programmed
through CSORn[WS]. The external transfer acknowledge signal, TA, is provided to allow
off-chip control of wait states. External control of wait states is enabled when CSORn[WS]
is 0x1F. When TA is used to terminate the bus cycle, the bus cycle will have a minimum of
one wait states. Additional wait states can be added by delaying the assertion of TA.
SDCLK
A[22:0]
D[31:0]
OE, BS[3:0]
R/W
CSn
TA
Figure 20-3. Longword Read; EBI = 00; 32-Bit Port; Internal Termination
(H)
(H)
Wait states, if needed, are added immediately after C2 in
Figure 20-3.
Chapter 20. Bus Operation
C1
NOTE:
C2
External Bus Interface Types
20-9