R

DC and Switching Characteristics

Table 54: Configuration Timing Requirements for Attached Parallel NOR Flash

Symbol

Description

 

Requirement

 

Units

TCE

Parallel NOR Flash PROM chip-select time

 

TCE

TIN ITADDR

 

ns

(tELQV)

 

 

 

 

 

 

 

 

 

 

TOE

Parallel NOR Flash PROM output-enable time

 

TOE

TINITAD DR

 

ns

(tGLQV)

 

 

 

 

 

 

 

 

 

 

TACC

Parallel NOR Flash PROM read access time

TACC

TCCL Kn(min) TCC O

TDCC PCB

ns

(tAVQV)

 

 

 

 

 

 

 

 

TBYTE

For x8/x16 PROMs only: BYTE# to output valid time(3)

 

TBYTE

TINITAD DR

ns

(tFLQV, tFHQV)

 

 

 

 

 

 

 

 

 

Notes:

1.These requirements are for successful FPGA configuration in BPI mode, where the FPGA generates the CCLK signal. The post-configuration timing can be different to support the specific needs of the application loaded into the FPGA.

2.Subtract additional printed circuit board routing delay as required by the application.

3.The initial BYTE# timing can be extended using an external, appropriately sized pull-down resistor on the FPGA’s LDC2 pin. The resistor value also depends on whether the FPGA’s PUDC_B pin is High or Low.

DS610-3 (v2.0) July 16, 2007

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55

Product Specification

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Image 55
Xilinx DS610 manual Symbol Description Requirement Units, Parallel NOR Flash Prom chip-select time