SZF2002 datasheet(70/76 Pages) PHILIPS

Il numero della parte	SZF2002

Spiegazioni elettronici	Low voltage 8-bit microcontroller with 6-kbyte embedded RAM

PDF	76 Pages

Scroll/Zoom	100%

Produttore elettronici	PHILIPS [NXP Semiconductors]

Homepage	http://www.nxp.com

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70 / 76 page

1998 Aug 26

Philips Semiconductors

Product speciﬁcation

Low voltage 8-bit microcontroller with

6-kbyte embedded RAM

SZF2002

Fig.30 External RAM access w.r.t. RAMCE, OE and WE.

(1) A0 to A3 alternative functions (PSEN, ALE, WR and RD) show Debug mode timing (Data bus carries low address on falling ALE edge.

(2) Skipped ALE pulse because of MOVX instruction.

(3) (Last) data sample moment.

(4) Code fetch only if CE is active (not shown). CE and RAMCE are never active at the same time.

handbook, full pagewidth

MGM355

XCLK

CODE FETCH(4)

D0 to D7

A0 to A17

RAMCE

A2/ALE(1)

code in

data out

data in

CODE FETCH(4)

WRITE(

)/READ(

)

CODE FETCH(4)

A3/PSEN(1)

A0/RD(1)

A1/WR(1)

S1 to S6: one machine cycle

tXCLKH

tXCLKL

t(CEL)

t(RCEL-OEL)

t(OEL)

t(RCEL-WEL)

t(WEL)

t(RCEH-OEH)

(2)

t(RCEH-WEH)

tsu(RCEL-D)

tsu(OEL-D)

th(WEH-D)

th(OEH-DZ)

tsu(DZ-OEL)

tsu(D-WEL)

t(RCEL-DV)

tsu(A-RCEL)

tsu(D-SM)

th(SM-D)

Data sample moment(3)

Code sample moment(3)

th(RCEH-A)

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