JS48F4400P0P3C0 datasheet(80/139 Pages) NUMONYX

80 / 139 page

Numonyx™ StrataFlash® Cellular Memory (M18)

Datasheet

April 2008

309823-10

9.3.1

Output Driver Control

Output Driver Control enables the user to adjust the device’s output-driver strength of

the data I/O bus and WAIT signal. Upon power-up or reset, ECR[2:0] defaults to an

output impedance setting of 30 Ohms. To change the output-driver strength, ECR[2:0]

must be programmed to the desired setting as shown in Table 34, “Output Driver

Control Characteristics”.

9.3.2

Programming the ECR

The ECR is programmed by issuing the Program Enhanced Configuration Register

command. This is a two-cycle command sequence requiring a Setup command to be

issued first, followed by a Confirm command. Bus-write cycles to the flash device

between the setup and confirm commands are not allowed—a command sequence

error will result. However, flash bus-read cycles between the Setup and Confirm

commands are allowed.

Table 33: Enhanced Configuration Register Bit Definitions

Enhanced Configuration Register

Default = 0004h

Deep Power Down

(DPD) Mode

DPD Polarity

Reserved

Output Driver Control

13:3

Bit

Name

Description

Deep Power Down (DPD) Mode

0 = DPD Disabled (default)

1 = DPD Enabled

DPD Pin Polarity

0= Active Low (default)

1= Active High

13:3

Reserved

Write 0 to reserved bits

2:0

Output Driver Control

Bits:

2 1 0

001= 1

010= 2

011= 3

100= 4 (default)

101= 5

110= 6

(Other bit settings are reserved)

Table 34: Output Driver Control Characteristics

Control Bits ECR[2:0]

Impedance @ VCCQ/2 (Ohm)

Driver Multiplier

Load Driven at Same Speed (pF)

001

(1)

1/3

010

(2)

1/2

011

(3)

2/3

100

(4) default

101

(5)

3/2

110

(6)

JS48F4400P0P3C0 Datasheet(PDF) 80 Page - Numonyx B.V

JS48F4400P0P3C0 Datasheet(HTML) 80 Page - Numonyx B.V

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

Datasheet Download

Link URL