P8044AH-R0117 datasheet(50/65 Pages) INNOVASIC

50 / 65 page

IA8044/IA8344

Data Sheet

SDLC Communications Controller

March 30, 2010

IA211010112-04

http://www.Innovasic.com

UNCONTROLLED WHEN PRINTED OR COPIED

Customer Support:

Page 50 of 65

1-888-824-4184

AC Specifications

AC characteristics, external data memory characteristics, serial interface characteristics, and

external clock drive characteristics are provided in Tables 48 through 51, respectively.

TA = −40 C to +85 C, VDD = 5V

10%, VSS = 0V, Load Capacitance = 87pF

Table 48. External Program Memory Characteristics

Symbol

Parameter

12 MHz Osc

Variable Clock

1/TCLCL = 3.5 MHz to 12 MHz

Unit

Min

Max

Min

Max

TLHLL

ALE Pulse Width

171

–

2TCLCL+4

–

TAVLL

Address Valid to ALE Low

–

TCLCL-8

–

TLLAX

Address Hold After ALE Low

–

TCLCL-9

–

TLLIV

ALE Low to Valid Instr. In.

–

298

–

4TCLCL-35

TLLPL

ALE Low to PSENn Low

–

TCLCL

–

TPLPH

PSENn Pulse Width

254

–

3TCLCL+4

–

TPLIV

PSENn Low to Valid Instr. In

–

215

–

3TCLCL-35

TPXIX

Input Instr. Hold After PSENn

–

TPXIZ

Input Instr. Float After PSENn

–

TCLCL-7

TPXAV

PSENn to Address Valid

–

TCLCL+8

–

TAVIV

Address to Valid Instr. In

–

373

–

5TCLCL-43

TAZPL

Address Float to PSENn

-9

–

-9

–

TCY

Machine cycle

996

–

12TCLCL

–

Table 49. External Data Memory Characteristics

Symbol

Parameter

12 MHz Osc

Variable Clock

1/TCLCL = 3.5 MHz to 12 MHz

Unit

Min

Max

Min

Max

TRLRH

RDn Pulse Width

487

–

6TCLCL-13

–

TWLWH

WRn Pulse Width

487

–

6TCLCL-13

–

TLLAX

Address Hold After ALE

–

TCLCL-9

–

TRLDV

RDn Low to Valid Data In

–

383

–

5TCLCL-35

TRHDX

Data Hold After RDn

–

TRHDZ

Data Float After RDn

–

165

–

2TCLCL-2

TLLDV

ALE Low to Valid Data In

–

633

–

8TCLCL-34

TAVDV

Address to Valid Data In

–

708

–

9TCLCL-42

TLLWL

ALE Low to RDn or WRn Low

250

3TCLCL

TAVWL

Address to RDn or WRn Low

325

–

4TCLCL-8

–

TQVWX

Data Valid to WRn Transition

–

TCLCL-7

–

TQVWH

Data Setup Before WRn High

563

–

7TCLCL-20

–

TWHQX

Data Held After WRn

–

TCLCL+3

–

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