dsp56800eerm Freescale Semiconductor, Inc, dsp56800eerm Datasheet - Page 139

• Manufacturer Part Number: dsp56800eerm
• Description: 16-bit Digital Signal Controllers
• Manufacturer: Freescale Semiconductor, Inc

10.3 AC Electrical Characteristics
Tests are conducted using the input levels specified in
propagation delays are measured from the 50% to the 50% point, and rise and fall times are measured
between the 10% and 90% points, as shown in
Figure 10-2
10.4 Flash Memory Characteristics
Freescale Semiconductor
Preliminary
•
•
•
•
1. There is additional overhead which is part of the programming sequence. See the 56F8300 Peripheral User Manual
2. Specifies page erase time. There are 512 bytes per page in the Data and Boot Flash memories. The Program Flash
Characteristic
Program time
Erase time
Mass erase time
for details. Program time is per 16-bit word in Flash memory. Two words at a time can be programmed within the Pro-
gram Flash module, as it contains two interleaved memories.
module uses two interleaved Flash memories, increasing the effective page size to 1024 bytes.
Input Signal
Note: The midpoint is V
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
Data Invalid State
shows the definitions of the following signal states:
2
Data1 Valid
1
Data1
Figure 10-1 Input Signal Measurement References
Fall Time
IL
+ (V
Data Active
Midpoint1
Table 10-12 Flash Timing Parameters
IH
V
– V
IH
IL
Figure 10-2 Signal States
)/2.
56F8357 Technical Data, Rev. 15
Data2 Valid
Symbol
T
T
Data2
T
erase
prog
me
Figure
Low
V
IL
OL
10-1.
Min
100
20
20
or V
Tri-stated
OH
Data
Table
OL
Typ
Rise Time
10-5. Unless otherwise specified,
—
—
—
and V
High
OH
Data3 Valid
Data Active
Data3
Max
—
—
—
AC Electrical Characteristics
90%
50%
10%
Unit
ms
ms
μs
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