mcf5208 Freescale Semiconductor, Inc, mcf5208 Datasheet - Page 28

• Manufacturer Part Number: mcf5208
• Description: Mcf5208 Coldfire Microprocessor Data Sheet
• Manufacturer: Freescale Semiconductor, Inc

Electrical Characteristics
5.7.1.1
The following timing numbers indicate when data will be latched or driven onto the external bus, relative
to the system clock.
28
NOTES:
1
2
Num
FB1
FB2
FB3
FB4
FB5
FB6
FB7
Timing for chip selects only applies to the FB_CS[5:0] signals. Please see
timing.
The FlexBus supports programming an extension of the address hold. Please consult the device reference manual for
more information.
Frequency of Operation
Clock Period (FB_CLK)
Data, and Control Output Valid (A[23:0], D[31:0],
FB_CS[5:0], R/W, TS, BE/BWE[3:0] and OE)
Data, and Control Output Hold ((A[23:0], D[31:0],
FB_CS[5:0], R/W, TS, BE/BWE[3:0], and OE)
Data Input Setup
Data Input Hold
Transfer Acknowledge (TA) Input Setup
Transfer Acknowledge (TA) Input Hold
FlexBus AC Timing Characteristics
BE/BWEn
FB_CLK
FB_CSn
D[31:0]
A[23:0]
R/W
OE
TS
TA
Characteristic
MCF5208 ColdFire
Table 11. FlexBus AC Timing Specifications
FB1
FB2
Figure 14. FlexBus Read Timing
®
Microprocessor Data Sheet, Rev. 1
FB4
FB6
DATA
A[23:0]
t
t
Symbol
FBCHDCV
t
t
FBCHDCI
t
t
DVFBCH
CVFBCH
DIFBCH
CIFBCH
t
FBCK
FB7
FB5
Section 5.8, “SDRAM Bus”
Min
3.5
12
—
FB3
1
0
4
0
83.33
Max
7.0
—
—
—
—
—
Freescale Semiconductor
Unit
Mhz
for SD_CS[1:0]
ns
ns
ns
ns
ns
ns
ns
Notes
f
sys/2
t
1, 2
cyc
1