W97AH6KB datasheet(102/127 Pages) WINBOND

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W97AH6KB / W97AH2KB

Publication Release Date: May 15, 2014

Revision: A01-001

- 102 -

8.3.2.2

IDD6 Partial Array Self-Refresh Current, -40°C~85°C (x16, x32)

Parameter

Symbol Power Supply

400 MHz

533 MHz

Condition

Unit

IDD6 Partial Array

Self-Refresh

Current

Full Array

IDD61

VDD1

900

Self refresh current

CK_t=LOW, CK_c=HIGH;

CKE is LOW;

CA bus inputs are STABLE;

Data bus inputs are STABLE;

µA

IDD62

VDD2

2000

IDD6IN

VDDCA

VDDQ

1/2 Array

IDD61

VDD1

800

µA

IDD62

VDD2

1500

IDD6IN

VDDCA

VDDQ

1/4 Array

IDD61

VDD1

700

µA

IDD62

VDD2

1200

IDD6IN

VDDCA

VDDQ

1/8 Array

IDD61

VDD1

650

µA

IDD62

VDD2

1000

IDD6IN

VDDCA

VDDQ

Notes:

1. LPDDR2-S4 SDRAM uses the same PASR scheme & IDD6 current value categorization as LPDDR (JESD209).

2. LPDDR2-S4 SDRAM devices support both bank-masking & segment-masking. The IDD6 currents are measured using bank-masking only.

3. IDD values published are the maximum of the distribution of the arithmetic mean.

8.4

Clock Specification

The jitter specified is a random jitter meeting a Gaussian distribution. Input clocks violating the min/max values may

result in malfunction of the LPDDR2 device.

8.4.1

Definition for tCK(avg) and nCK

tCK(avg) is calculated as the average clock period across any consecutive 200 cycle window, where each clock period

is calculated from rising edge to rising edge.

tCK(avg) =















tCK

/ N

where

N = 200

Unit ‘tCK(avg)’ represents the actual clock average tCK(avg) of the input clock under operation. Unit ‘nCK’ represents

one clock cycle of the input clock, counting the actual clock edges.

tCK(avg) may change by up to ± 1% within a 100 clock cycle window, provided that all jitter and timing specs are met.

8.4.2

Definition for tCK(abs)

tCK(abs) is defined as the absolute clock period, as measured from one rising edge to the next consecutive rising

edge.

tCK(abs) is not subject to production test.

W97AH6KB Datasheet(PDF) 102 Page - Winbond

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