iCE40 LP/HX Family

Data Sheet

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36

FPGA-DS-02029-3.5

4.27. sysCONFIG Port Timing Specifications

Symbol

Parameter

Min

Typ

Max

Unit

All Configuration Modes

t

CRESET_B

Minimum CRESET_B Low

pulse width required to

restart configuration, from

falling edge to rising edge

—

200

—

—

ns

t

DONE_IO

Number of configuration

clock cycles after CDONE goes

High before the PIO pins are

activated

—

49

—

—

Clock

Cycles

Slave SPI

t

CR_SCK

Minimum time from a rising

edge on CRESET_B until the

first SPI write operation, first

SPI_SCK. During this time, the

iCE40 device is clearing its

internal configuration

memory.

iCE40LP384

600

—

—

us

iCE40LP640, iCE40LP/HX1K

800

—

—

us

iCE40LP/HX4K

1200

—

—

us

iCE40LP/HX8K

1200

—

—

us

t

CR_SCK

Minimum time from a rising

edge on CRESET_B until the

first SPI write operation, first

SPI_SCK. During this time, the

iCE40 LP/HX device is clearing

its internal configuration

memory.

Write

1

—

25

MHz

Read iCE40LP384

2

—

15

—

MHz

Read iCE40LP640, iCE40LP/HX1K

2

—

15

—

MHz

Read iCE40LP/HX4K

2

—

15

—

MHz

Read iCE40LP/HX8K

2

—

15

—

MHz

t

CCLKH

CCLK clock pulse width high

—

20

—

—

ns

t

CCLKL

CCLK clock pulse width low

—

20

—

—

ns

t

STSU

CCLK setup time

—

12

—

ns

t

STH

CCLK hold time

—

12

—

—

ns

t

STCO

CCLK falling edge to valid

output

—

13

—

—

ns

Master SPI

f

MCLK

MCLK clock frequency

Off

—

0

—

MHz

Low Frequency (Default)

—

7.5

—

MHz

Medium Frequency

3

—

24

—

MHz

High Frequency

3

—

40

—

MHz

t

MCLK

CRESET_B high to first MCLK

edge

iCE40LP384 - Low Frequency (Default)

600

—

—

us

iCE40LP384 - Medium Frequency

600

—

—

us

iCE40LP384 - High Frequency

600

—

—

us

iCE40LP640, iCE40LP/HX1K - Low

Frequency (Default)

800

—

—

us

iCE40LP640, iCE40LP/HX1K - Medium

Frequency

800

—

—

us

iCE40LP640, iCE40LP/HX1K - High

Frequency

800

—

—

us

iCE40LP/HX1K -Low Frequency (Default)

800

—

—

us

iCE40LP/HX1K - Medium Frequency

800

—

—

us

iCE40LP/HX1K - High Frequency

800

—

—

us

iCE40LP/HX4K - Low Frequency (Default)

1200

—

—

us