XA-H4 Datasheet, PDF(34/42 Page) NXP Semiconductors – Single-chip 16-bit microcontroller

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XA-H4 Datasheet, PDF (34/42 Pages) NXP Semiconductors – Single-chip 16-bit microcontroller

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Philips Semiconductors

Single-chip 16-bit microcontroller

Preliminary specification

XA-H4

ClkOut

RAS

CASL, CASH

D[15:0]

tCHAV

RAS ADDRESS

tCHSL

tAVSL

tCHAH

tCHSL

CAS ADDRESS

tCHAV

tCHAH

tCHSL

tAVSL

CAS ADDRESS +2

tCHSH

tCPWH

tDIS

Note 2

tDIS

INSTRUCTION

Note: The processor can fetch from one to eight Words (1 Word = 2 bytes)

tCHAV

tCHAH

tCHSH

Note 2

INSTRUCTION

Figure 12. DRAM FPM (Fast Page Mode) Burst Code Fetch

SU01281

ClkOut

RAS (CS)

tCHAV

tCHAH

RAS ADDRESS

tAVSL

tCHSL

CAS (BHE/BLE)

tCHDV

tCHSL

CAS ADDRESS

tAVSL

Note 1

Valid Data

tCHSH

tCHAH

tCHSH

Note. OE is inactive during all writes.

Figure 13. DRAM Write (on 16-Bit Bus, also 8-Bit Write on 8-Bit Bus)

SU01282

1999 Sep 24

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