PSD511B1 datasheet(118/153 Pages) STMICROELECTRONICS

118 / 153 page

PSD5XX Family

115

Explanation of AC Symbols for Non ZPLD Timing.

Example:

t AVLX Time from Address Valid to ALE Invalid.

A – Address

L – Logic Level Low or ALE

T – R/W

C – Power Down

N – Reset

t – Time

D– Input Data

P – Port Signal

V – Valid

E –E

Q – Output Data

X – No Longer a Valid Logic Level

H – Logic Level High

R – WR, UDS, LDS, DS, IORD, PSEN

Z – Float

I – Interrupt

S – Chip Select

-70

-90*

-15

EPROM_CMiser

Symbol

Parameter

Conditions

Min Max Min Max Min Max

Unit

tLVLX

ALE or AS Pulse Width

tAVLX

Address Setup Time

(Note 4)

tLXAX

Address Hold Time

(Note 4)

tAVQV

Address Valid to Data

Valid

(Note 4)

150

Add 10

t SLQV

CS Valid to Data Valid

100

150

Add 10

RD to Data Valid

8/16-Bit Bus

(Note 1)

t RLQV

RD to Data Valid 8-Bit

Bus, 8031 Separate

(Note 2)

Mode

RD to Data Valid from

(Note 3)

Interrupt Controller

t RHQX

RD Data Hold Time

(Note 1)

tRLRH

RD Pulse Width

(Note 1)

tRHQZ

RD to Data High-Z

(Note 1)

tEHEL

E Pulse Width

tTHEH

R/W Setup Time

to Enable

810

tELTL

R/W Hold Time After

Enable

In 16-Bit Data Bus

tAVPV

Address Input Valid to

Mode (Note 5)

Address Output Delay

In 8-Bit Data Bus

Mode (Note 5)

Read Timing (5 V ± 10% Versions)

NOTES: 1. RD timing has the same timing as PSEN, DS, LDS, UDS signals.

2. RD and PSEN have the same timing for 8031 mode.

3. Read to Data Valid of the Interrupt Request Latch and Interrupt Priority Status. RD timing has the same timing as PSEN, DS,

LDS, UDS signals.

4. Any input used to select an internal PSD5XX function.

5. In multiplexed mode latched address generated from ADIO delay to address output on any Port.

*The -90 speed is available only on Industrial Temperature Range product.

13.8 Microcontroller Interface – AC/DC Parameters (5 V ± 10% Versions)

PSD511B1 Datasheet(PDF) 118 Page - STMicroelectronics

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