TMPR3911 datasheet(131/462 Pages) TOSHIBA

Part #	TMPR3911

Description	32-Bit TX System RISC TX39 Family

PDF	462 Pages

Scroll/Zoom	100%

Manufacturer	TOSHIBA [Toshiba Semiconductor]

Direct Link	http://www.semicon.toshiba.co.jp/eng

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131 / 462 page

Chapter 4 BIU Module

4-31

Figure 4.4.6 Word Read and Write to 16-Bit SDRAM

Figure 4.4.7 4-Word Burst Read and Byte Write to 16-Bit SDRAM

(6) Support of Four-Bank SDRAM (only by TMPR3911BU/BXB and TMPR3912XB-92/AU-92)

The TMPR3912XB-92/AU-92 supports four-bank SDRAM. When DRAM banks 0 and 1 are 16-bit

SDRAM, Addr[21] is output from the CAS2* pin.

Also, by setting ROW and COL as follows,

Addr[22] can be output from the A[12] pin.

ROW: 22, 18, 20, 19, 17:9 (ROWSEL

= 01)

COL:

22, X,

φ, X, X, 8:1 (COLSEL = 1000)

The CAS2* pin (Addr[21]) and A[12] pin (Addr[22]) can be connected to the four-bank SDRAM

bank select pin so that the CAS2* and A[12] pins are used for the bank select signal.

DCLKOUT

A[12:0]

D[7:0]

DCS0/1*

RAS*

CAS*

WE*

ROW

COLUMN

32-bit

WRITE

DQMH

DQML

DCKE

DCLKOUT

A[12:0]

D[7:0]

DCS0/1*

RAS*

CAS*

WE*

ROW

COL

COLUMN

4 WORD BURST READ

BYTE

WRITE

DQMH

DQML

DCKE

COL COL

ROW

COLUMN

TMPR3911 Datasheet(PDF) 131 Page - Toshiba Semiconductor

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