TWR-56F8257 Freescale Semiconductor, TWR-56F8257 Datasheet - Page 57

• Manufacturer Part Number: TWR-56F8257
• Description: TOWER SYSTEM KIT MC56F8257
• Manufacturer: Freescale Semiconductor
• Type: DSC, Digital Signal Controllerr

Specifications of TWR-56F8257

• Contents: Board, Cables, Documentation, DVD
• For Use With/related Products: Freescale Tower System, MC56F8257
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 16
7.11
7.12
7.13
Freescale Semiconductor
1
2
3
NanoEdge Placement (NEP) step size
Delay for fault input activating to PWM output deactivated
Required: IP bus clock is between 50 MHz and ~60 Mhz in NanoEdge Placement mode.
NanoEdge Placement step size is a function of clock frequency only. Temperature and voltage variations do not affect
NanoEdge Placement step size.
In NanoEdge Placement mode, the minimum pulse edge-to-edge cannot be less than 4 PWM clock cycles.
•
•
•
•
1
2
Additional overhead is part of the programming sequence. Refer to the device’s reference manual for details.
Specifies page erase time. There are 1024 bytes per page in the program flash memory.
Frequency of operation (external clock driver)
Active state, when a bus or signal is driven, and enters a low impedance state
Tri-stated, when a bus or signal is placed in a high impedance state
Data Valid state, when a signal level has reached V
Data Invalid state, when a signal level is in transition between V
shows the definitions of the following signal states:
Enhanced Flex PWM Characteristics
Flash Memory Characteristics
External Clock Operation Timing
Data Invalid State
Mass erase time
Characteristic
Program time
Erase time
Data1 Valid
Clock pulse width
Data1
Characteristic
Characteristic
Table 29. External Clock Operation Timing Requirements
2
1
MC56F825x/MC56F824x Digital Signal Controller, Rev. 3
Table 27. Enhanced Flex PWM Timing Parameters
Data Active
1 2 3
3
Table 28. Flash Timing Parameters
Data2 Valid
Figure 16. Signal States
Symbol
t
Data2
t
erase
prog
t
me
2
Symbol
OL
f
t
osc
PW
or V
Symbol
Min
100
—
—
OH
20
20
Data
Three-stated
OL
6.25
Min
—
and V
Min
—
1
Typ
OH
—
—
—
Typ
—
—
Typ
521
—
Data3 Valid
Data Active
Data3
1
Max
40
—
—
Max
120
—
Max
—
Specifications
Unit
Unit
MHz
ms
ms
ns
s
Unit
ps
ns
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