Datasheet

EP2
EP3
EP4
EP5 EP6
EP7
EP8
EP9
EZP_CK
EZP_CS
EZP_Q (output)
EZP_D (input)
Figure 9. EzPort Timing Diagram
6.4.3 Flexbus Switching Specifications
All processor bus timings are synchronous; input setup/hold and output delay are given in
respect to the rising edge of a reference clock, FB_CLK. The FB_CLK frequency may be
the same as the internal system bus frequency or an integer divider of that frequency.
The following timing numbers indicate when data is latched or driven onto the external
bus, relative to the Flexbus output clock (FB_CLK). All other timing relationships can be
derived from these values.
Table 25. Flexbus limited voltage range switching specifications
Num Description Min. Max. Unit Notes
Operating voltage 2.7 3.6 V
Frequency of operation — FB_CLK MHz
FB1 Clock period 20 — ns
FB2 Address, data, and control output valid — 11.5 ns 1
FB3 Address, data, and control output hold 0.5 — ns 1
FB4 Data and FB_TA input setup 8.5 — ns 2
FB5 Data and FB_TA input hold 0.5 — ns 2
1. Specification is valid for all FB_AD[31:0], FB_BE/BWEn, FB_CSn, FB_OE, FB_R/W,FB_TBST, FB_TSIZ[1:0], FB_ALE,
and FB_TS.
Peripheral operating requirements and behaviors
K20 Sub-Family Data Sheet Data Sheet, Rev. 7, 02/2013.
36 Freescale Semiconductor, Inc.