NSAM265SR Datasheet, PDF(40/58 Page) National Semiconductor (TI)

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NSAM265SR Datasheet, PDF (40/58 Pages) National Semiconductor (TI) – CompactSPEECH Digital Speech Processors

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Appendix A Device Specifications (Continued)

TABLE A-2 Timing for Output Signals (Continued)

Symbol Figure

Description

Reference Conditions

Min (ns)

tRASh

A-10

RAS Hold

After R E CTTL

tRASia

A-10

RAS Inactive

After R E CTTL T3 or T3RF

tRASLw

A-13

DRAM PDM RAS Width

At 0 8V Both Edges

tRLCL

A-13

DRAM PDM RAS Low after CAS Low F E CAS to F E RAS

tWRa

A-17

WR0 Active

After R E CTTL T1

tWRCSh

A-17

WR0 Hold after EMCS (Note B)

R E EMCS R E to R E WR0

tWRh

A-17

WR0 Hold

After R E CTTL

tWRia

A-17

WR0 Inactive

After R E CTTL T3

Note A In normal operation tCTp must be 48 8 ns in power-down mode tCTp must be 50 000 ns

Note B Guaranteed by design but not fully tested

200 0

10 0

tCTp 2 b 6

Symbol

Figure

Table A-3 Input Signals

Description

Reference Conditions

tCDIh

tCDIs

tDIh

tDIs

tMWCKh

tMWCKI

tMWCKp

tMWCLKh

tMWCLKs

tMWCSh

tMWCSs

tMWDIh

tMWDIs

tPWR

tRSTw

tXh

tXI

tXp

A-14

A-10

A-18

A-23

A-22

A-21

CDIN Hold

CDIN Setup

Data in Hold (D0 7)

Data in Setup (D0 7)

MICROWIRE Clock High (Slave)

MICROWIRE Clock Low (Slave)

MICROWIRE Clock Period (Slave) (Note A)

MWCLK Hold

MWCLK Setup

MWCS Hold

MWCS Setup

MWDIN Hold

MWDIN Setup

Power Stable to RESET R E (Note B)

RESET Pulse Width

CLKIN High

CLKIN Low

CLKIN Clock Period

Note A Guaranteed by design but not fully tested in power-down mode

Note B Guaranteed by design but not fully tested

After R E CTTL

Before R E CTTL

After R E CTTL T1 T3 or TI

Before R E CTTL T1 T3 or TI

At 2 0V (Both Edges)

At 0 8V (Both Edges)

R E MWCLK to next R E MWCLK

After MWCS becomes Inactive

Before MWCS becomes Active

After F E MWCLK

Before R E MWCLK

After R E MWCLK

Before R E MWCLK

After VCC reaches 4 5V

At 0 8V (Both Edges)

At 2 0V (Both Edges)

At 0 8V (Both Edges)

R E CLKIN to next R E CLKIN

Max (ns)

12 0

tCTp 2 a12

tCTp 2 a 12

Min (ns)

11 0

15 0

100 0

2 5 ms

50 0

100

50 0

100 0

50 0

100 0

30 ms

10 ms

tX1p 2 b 5

24 4

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