IS43LD16640C datasheet(72/142 Pages) ISSI

72 / 142 page

IS43/46LD16640C

IS43/46LD32320C

Integrated Silicon Solution, Inc. — www.issi.com

Rev. C

07/02/2021

® Long-term Support

World Class Quality

Notes:

1. At time Ty, the device is in the idle state.

2. Only the NOP command is supported during tMRW.

Data Calibration Pattern Description

Truth Table for MRR and MRW

MODE REGISTER WRITE Command

The MODE REGISTER WRITE (MRW) command is used to write configuration data to the mode

registers. The MRW command is initiated with CS# LOW, CA0 LOW, CA1 LOW, CA2 LOW, and

CA3 LOW at the rising edge of the clock. The mode register is selected by

CA1f–CA0f, CA9r–CA4r. The data to be written to the mode register is contained in CA9f–CA2f.

The MRW command period is defined by tMRW. MRWs to read-only registers have no impact on

the functionality of the device. MRW can only be issued when all banks are in the idle precharge

state. One method of ensuring that the banks are in this state is to issue a PRECHARGE ALL com-

mand.

MODE REGISTER WRITE Timing – RL = 3, tMRW = 5

Pattern

MR#Bit Time 0Bit Time 1Bit Time 2Bit Time 3Notes

Pattern AMR321

Reads to MR32 return DQ callibration pattern A

Pattern BMR400

Reads to MR32 return DQ callibration pattern B

Current State

CommandIntermediate StateNext State

MRRMode Register Reading (All Banks idle)All Banks idle

MRWMode Register Writing (All Banks idle)All Banks idle

MRW (Reset)

Restting (Device Auto-Init)

All Banks idle

MRRMode Register Reading (Bank(s) idle)Bank(s) Active

MRW

Not AllowedNot Allowed

MRW (Reset)

Not AllowedNot Allowed

All Banks idle

Bank(s) Active

MR data

MR addr

MRWNOP 2

MRW

Tx + 1

Tx + 2Ty1

Ty + 1Ty + 2

CK#

CA[9:0]

CMD

Valid

tMRW

MR data

MR addr

NOP 2

IS43LD16640C bảng dữ liệu(PDF) 72 Page - Integrated Silicon Solution, Inc

IS43LD16640C bảng dữ liệu(HTML) 72 Page - Integrated Silicon Solution, Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

bảng dữ liệu tải về

Link URL