56F8167 datasheet(147/182 Pages) FREESCALE

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Flash Memory Characteristics

56F8367 Technical Data, Rev. 9

Freescale Semiconductor

147

Preliminary

Figure 10-3 Signal States

10.4 Flash Memory Characteristics

10.5 External Clock Operation Timing

Table 10-12 Flash Timing Parameters

Characteristic

Symbol

Min

Typ

Max

Unit

Program time1

1. There is additional overhead which is part of the programming sequence. See the 56F8300 Peripheral User Manual

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.

Tprog

—

μs

Erase time2

2. Specifies page erase time. There are 512 bytes per page in the Data and Boot Flash memories. The Program Flash

Module uses two interleaved Flash memories, increasing the effective page size to 1024 bytes.

Terase

—

Mass erase time

Tme

100

—

Table 10-13 External Clock Operation Timing Requirements1

1. Parameters listed are guaranteed by design.

Characteristic

Symbol

Min

Typ

Max

Unit

Frequency of operation (external clock driver)2

2. See Figure 10-4 for details on using the recommended connection of an external clock driver.

fosc

0—

120

MHz

Clock Pulse Width3

3. The high or low pulse width must be no smaller than 8.0ns or the chip will not function.

tPW

3.0

—

External clock input rise time4

4. External clock input rise time is measured from 10% to 90%.

trise

—

External clock input fall time5

5. External clock input fall time is measured from 90% to 10%.

tfall

—

Data Invalid State

Data1

Data2 Valid

Data

Tri-stated

Data3 Valid

Data2

Data3

Data1 Valid

Data Active

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