ORSPI4 datasheet(191/263 Pages) LATTICE

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ORCA ORSPI4 Data Sheet

191

Supported Data Rates

The Memory Controller on the ORSPI4 device can support the following data rates.

Table 74. Supported Data Rates (36-Bit QDR-II, 32 bit Considered Data)

1. Data Rate = (Max. write data rate + Max. read data rate) for 32 bits of data.

2. Characterized with 200 Mhz rated QDR-II SRAM devices with their DLL enabled. Duty cycle of PMIC and PMICN signals was close to 50%.

3. Assumes board trace lengths of 3 inches or less.

Memory Controller Input/Output Timing Speciﬁcation

Figure 99. Memory Controller Output Timing Speciﬁcations

Table 75. Memory Controller Output Timing Speciﬁcations

Data Rate

-1

-2

-3

Clock Frequency (DDR)

Data Rate

1, 2

Clock Frequency (DDR) Data Rate

1, 2

Clock Frequency (DDR)

Data Rate

1, 2

156 MHz

19.97 Gbps

165 MHz

21.12 Gbps

175 MHz

22.40 Gbps

Symbol

Description

Min Value

Max Value

Units

tai

PMIK to previous address invalid

1.2

–

tav

PMIK to address valid

2.0

–

tdi

PMIK to previous data invalid

1.0

–

tdv

PMIK to data valid

2.65

–

DPMIK(N)

PMIK/PMINKN duty cycle

40%

60%

PMIK/PMIKN

Clock Cycle

PMIKN

PMIA

PMID

PMIK

PMIK(N)

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