PIC18F66K22-I/PTRSL View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC18F66K22-I/PTRSL

64/80-Pin, High-Performance, 1-Mbit Enhanced Flash Microcontrollers with 12-Bit A/D and nanoWatt XLP Technology

Microchip Technology 

PIC18F87K22 FAMILY

FIGURE 31-6:

OSC1

A<19:8>

AD<7:0>

BA0

ALE

CE

OE

PROGRAM MEMORY FETCH TIMING DIAGRAM (8-BIT)

Q1

Q2

Q3

Q4

Q1

Address

167

166

150

151

161

Address

Data

Data

153

155

162A

154

162

163

170

170A

168

Q2

Address

Address

Note: Fmax = 25 MHz in 8-Bit External Memory mode.

TABLE 31-10: PROGRAM MEMORY FETCH TIMING REQUIREMENTS (8-BIT)

Param

No

Symbol

Characteristics

Min

Typ

Max

Units

150 TadV2aIL Address Out Valid to ALE  (address setup time) 0.25 TCY – 10 —

—

ns

151 TaIL2adl ALE  to Address Out Invalid (address hold time)

5

—

—

ns

153 BA01

BA0  to Most Significant Data Valid

0.125 TCY

—

—

ns

154 BA02

BA0  to Least Significant Data Valid

0.125 TCY

—

—

ns

155 TaIL2oeL ALE  to OE 

0.125 TCY

—

—

ns

161 ToeH2adD OE  to A/D Driven

0.125 TCY – 5 —

—

ns

162 TadV2oeH Least Significant Data Valid Before OE 

(data setup time)

20

—

—

ns

162A TadV2oeH Most Significant Data Valid Before OE 

(data setup time)

0.25 TCY + 20 —

—

ns

163 ToeH2adI OE  to Data in Invalid (data hold time)

0

—

—

ns

166 TaIH2aIH ALE  to ALE  (cycle time)

—

TCY

—

ns

167 TACC

Address Valid to Data Valid

0.5 TCY – 10 —

—

ns

168 Toe

OE  to Data Valid

—

— 0.125 TCY + 5 ns

170 TubH2oeH BA0 = 0 Valid Before OE 

0.25 TCY

—

—

ns

170A TubL2oeH BA0 = 1 Valid Before OE 

0.5 TCY

—

—

ns

DS39960D-page 506

 2011 Microchip Technology Inc.

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