JS28F512P30TFA datasheet(36/86 Pages) MICRON

36 / 86 page

P30-65nm

Datasheet

Sept 2012

Order Number: 208042-0

11.2.1

Read Mode (RCR.15)

The Read Mode (RM) bit selects synchronous burst-mode or asynchronous page-mode

operation for the device. When the RM bit is set, asynchronous page mode is selected

(default). When RM is cleared, synchronous burst mode is selected.

11.2.2

Latency Count (RCR[14:11])

The Latency Count (LC) bits tell the device how many clock cycles must elapse from the

rising edge of ADV# (or from the first valid clock edge after ADV# is asserted) until the

first valid data word is driven onto DQ[15:0]. The input clock frequency is used to

determine this value and Figure 10 shows the data output latency for the different

settings of LC. The maximum Latency Count for P30-65nm would be Code 5 based on

the Max clock frequency specification of 52MHz, and there will be zero WAIT States

when bursting within the word line. Please also refer to Section 11.2.3, “End of Word

Line (EOWL) Considerations” on page 38 for more information on EOWL.

Refer to Table 14, “LC and Frequency Support” on page 37 for Latency Code Settings.

Burst Wrap (BW)

0 =Wrap; Burst accesses wrap within burst length set by BL[2:0]

1 =No Wrap; Burst accesses do not wrap within burst length (default)

2:0

Burst Length (BL[2:0])

001 =4-word burst

010 =8-word burst

011 =16-word burst

111 =Continuous-word burst (default)

(Other bit settings are reserved)

Table 13: Read Configuration Register Description (Sheet 2 of 2)

JS28F512P30TFA データシート(PDF) 36 Page - Micron Technology