PSD934210MT View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

PSD934210MT

Flash PSD, 3.3V Supply, for 8-bit MCUs 2 Mbit + 256 Kbit Dual Flash Memories and 64 Kbit SRAM

STMicroelectronics 

PSD834F2V

Table 41. AC Symbols for PLD Timing

Signal Letters

A Address Input

C CEout Output

D Input Data

E E Input

G Internal WDOG_ON signal

I Interrupt Input

L ALE Input

N Reset Input or Output

P Port Signal Output

Q Output Data

R WR, UDS, LDS, DS, IORD, PSEN Inputs

S Chip Select Input

T R/W Input

W Internal PDN Signal

B VSTBY Output

M Output Macrocell

Example: tAVLX – Time from Address Valid to ALE

Invalid.

Signal Behavior

t Time

L Logic Level Low or ALE

H Logic Level High

V Valid

X No Longer a Valid Logic Level

Z Float

PW Pulse Width

Figure 35. Switching Waveforms – Key

WAVEFORMS

INPUTS

OUTPUTS

STEADY INPUT

STEADY OUTPUT

MAY CHANGE FROM

HI TO LO

MAY CHANGE FROM

LO TO HI

WILL BE CHANGING

FROM HI TO LO

WILL BE CHANGING

LO TO HI

DON'T CARE

OUTPUTS ONLY

CHANGING, STATE

UNKNOWN

CENTER LINE IS

TRI-STATE

AI03102

68/89

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