M69KB128AA datasheet(29/68 Pages) STMICROELECTRONICS

No. de pieza	M69KB128AA

Descripción Electrónicos	128 Mbit (8Mb x16) 1.8V Supply, Burst PSRAM

PDF	68 Pages

Scroll/Zoom	100%

Fabricante Electrónico	STMICROELECTRONICS [STMicroelectronics]

Página de inicio	http://www.st.com

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29 / 68 page

M69KB128AA

7 Configuration registers

29/68

Figure 7.

Set Configuration Register (Software Method)

Only the Bus Configuration Register (BCR) and the Refresh Configuration Register (RCR) can be modified.

To program the BCR or the RCR on last bus write cycle, DQ0-DQ15 must be set to ‘0001h’ and ‘0000’ respectively.

The highest order address location is not modified during this operation.

The control signal E must be toggled as shown in the above figure.

Figure 8.

Read Configuration Register (Software Method)

To read the BCR, RCR or DIDR on last bus read cycle, DQ0-DQ15 must be set to ‘0001h’, ‘0000’ and ‘0002’ respectively.

The highest order address location is not modified during this operation.

The control signal E must be toggled as shown in the above figure.

Addr.

7FFFFFh

LB, UB

AI09469f

7FFFFFh

DQ0-DQ15

(2)

Configuration

tEHEL2

Addr.

7FFFFFh

LB, UB

AI09470f

7FFFFFh

DQ0-DQ15

(1)

Configuration

tEHEL2

M69KB128AA Datasheet(PDF) 29 Page - STMicroelectronics