Datasheet > 7024

7024

更新时间： 2023-12-20 18:44:44

品牌	Logo	应用领域
瑞萨 - RENESAS		/
页数	文件大小	规格书
23页	336K
描述
4K x 16 Dual-Port RAM

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数据手册

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7024 数据手册

7024S/L

High-Speed 4K x 16 Dual-Port Static RAM

Military, Industrial and Commercial Temperature Ranges

Truth Table IV —

AddressBUSY Arbitration

Inputs

Outputs

0L-A11L

(1)

0R-A11R

Function

Normal

BUSY

BUSYR

NO MATCH

MATCH

(2)

Write Inhibit⁽³⁾

2740 tbl 17

NOTES:

1. Pins BUSY^Land BUSYR are both outputs when the part is configured as a master. Both are inputs when configured as a slave. BUSYX outputs on the IDT7024 are

push pull, not open drain outputs. On slaves, the BUSY asserted input internally inhibits write.

2. "L" if the inputs to the opposite port were stable prior to the address and enable inputs of this port. "H" if the inputs to the opposite port became stable after the address

and enable inputs of this port. If tAPS is not met, either BUSYL or BUSYR = LOW will result. BUSYL and BUSYR outputs cannot be LOW simultaneously.

3. Writes to the left port are internally ignored when BUSY^Loutputs are driving LOW regardless of actual logic level on the pin. Writes to the right port are internally ignored

when BUSY^Routputs are driving LOW regardless of actual logic level on the pin.

Truth Table V — Example of Semaphore Procurement Sequence^(1,2,3)

Functions

- D15 Left

- D15 Right

Status

No Action

Semaphore free

Left Port Writes "0" to Semaphore

Right Port Writes "0" to Semaphore

Left Port Writes "1" to Semaphore

Left Port Writes "0" to Semaphore

Right Port Writes "1" to Semaphore

Left Port Writes "1" to Semaphore

Right Port Writes "0" to Semaphore

Right Port Writes "1" to Semaphore

Left Port Writes "0" to Semaphore

Left Port Writes "1" to Semaphore

Left port has semaphore token

No change. Right side has no write access to semaphore

Right port obtains semaphore token

No change. Left port has no write access to semaphore

Left port obtains semaphore token

Semaphore free

Right port has semaphore token

Semaphore free

Left port has semaphore token

Semaphore free

2740 tbl 18

NOTES:

1. This table denotes a sequence of events for only one of the eight semaphores on the IDT7024.

2. There are eight semaphore flags written to via I/O0 and read from all the I/O's. These eight semaphores are addressed by A0-A2.

3. CE = VIH, SEM = VIL, to access the Semaphores. Refer to the Semaphore Read/Write Control Truth Table.

FunctionalDescription

TheIDT7024providestwoportswithseparatecontrol,addressand

I/Opinsthatpermitindependentaccessforreadsorwritestoanylocation

inmemory.TheIDT7024hasanautomaticpowerdownfeaturecontrolled

by CE. The CE controls on-chip power down circuitry that permits the

respectiveporttogointoastandbymodewhennotselected(CE=VIH).

Whenaportisenabled,accesstotheentirememoryarrayispermitted.

ormessagecenter)isassignedtoeachport. Theleftportinterruptflag

(INT^L) is asserted when the right port writes to memory location FFE

(HEX), whereawriteisdefinedastheCE=R/W=VILpertheTruthTable

III.TheleftportclearstheinterruptbyaccessaddresslocationFFEaccess

when CER = OER = VIL, R/W is a "don't care". Likewise, the right port

interruptflag(INTR)isassertedwhentheleftportwritestomemorylocation

FFF(HEX)andtocleartheinterruptflag(INTR),therightportmustaccess

thememorylocationFFF. Themessage(16bits)atFFEorFFFisuser-

defined,sinceitisanaddressableSRAMlocation.Iftheinterruptfunction

Interrupts

Iftheuserchoosestheinterruptfunction,amemorylocation(mailbox

6.42

Feb.20.20

1...14 15 161718 19 20...23

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与7024相关器件

型号	品牌	获取价格	描述	数据表
7024.7009.0	MOLEX	获取价格	Connector Accessory,
7024.921	SCHURTER	获取价格	Electric Fuse, VERY FAST BLOW ELECTRIC FUSE, 1A, 300VAC, 10000A (IR), INLINE/HOLDER, ROHS
7024.9260	SCHURTER	获取价格	Electric Fuse, Very Fast Blow, 3.15A, 300VAC, 10000A (IR), Inline/holder, ROHS COMPLIANT
7024.934	SCHURTER	获取价格	Electric Fuse, VERY FAST BLOW ELECTRIC FUSE, 15A, 300VAC, 10000A (IR), INLINE/HOLDER, ROHS
7024.9340	SCHURTER	获取价格	Electric Fuse, Very Fast Blow, 15A, 300VAC, 10000A (IR), Inline/holder, ROHS COMPLIANT
7024016PROCELL	ETC	获取价格	PROCELL BATTERY PP3 Inhalt pro Packung: 10 Stk.
70243	FCI-CONNECTOR	获取价格	2 mm Modular Interconnect System
70243-101LF	AMPHENOL	获取价格	PCB Connector, 6 Contact(s), Male, Straight, Locking, Natural Insulator, Receptacle, LEAD
70244	FCI-CONNECTOR	获取价格	2 mm Modular Interconnect System
70244-101LF	AMPHENOL	获取价格	PCB Connector, 6 Contact(s), Male, Right Angle, Solder Terminal, Locking, Natural Insulato

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