scf5249 Freescale Semiconductor, Inc, scf5249 Datasheet - Page 13

• Manufacturer Part Number: scf5249
• Description: Scf5249 Integrated Coldfire
• Manufacturer: Freescale Semiconductor, Inc

8
8.1
This section describes the SCF5249 input and output signals. The signal descriptions as shown in
are grouped according to relevant functionality.
Freescale Semiconductor
Address
Read-write control
Output enable
Data
Synchronous row address
strobe
Synchronous column
address strobe
SDRAM write enable
SDRAM upper byte
enable
SDRAM lower byte enable SDLDQM
SDRAM chip selects
SDRAM chip selects
SDRAM clock enable
System clock
Signal Name
Document Name
ColdFire2UMAD
Signal Descriptions
Introduction
ColdFire2UM
SCF5249UM
CFPRM/D
SCF5249 Integrated ColdFire® Microprocessor Data Sheet, Rev. 3
A[23:1]
A[25]/GPO8
RW_b
OE
D[31:16]
SDRAS
SDCAS
SDWE
SDUDQM
SDRAMCS1
SDRAMCS2/GPIO7
BCLKE
SCLK/GPIO10
ColdFire Family Programmer’s Reference Manual
Mnemonic
Table 3. SCF5249 Documentation
Processor User’s Manual Addendum
Table 4. SCF5249 Signal Index
Version 2/2M ColdFire Core
Version 2/2M ColdFire Core
Processor User’s Manual
SCF5249 User’s Manual
Description
23 address lines, address line 25
multiplexed with gpo8.
Bus write enable - indicates if read or
write cycle in progress
Output enable for asynchronous
memories connected to chip selects
Data bus used to transfer word data
Row address strobe for external
SDRAM.
Column address strobe for external
SDRAM
Write enable for external SDRAM
Indicates during write cycle if high
byte is written
Indicates during write cycle if low byte
is written
SDRAM chip select
SDRAM chip select
SDRAM clock enable
SDRAM clock output
Function
ColdFire2UMAD/D
ColdFire2UM/D
Order Number
SCF5249UM/D
CFPRM/D
Output
Signal Descriptions
Input/
In/Out
In/Out
In/Out
Outt
Out
Out
Out
Out
Out
Out
Out
Out
Out
negated
negated
negated
negated
negated
negated
Table 4
Reset
State
Hi-Z
H
X
13