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PIC18F6585 Datasheet, PDF (433/496 Pages) Microchip Technology – 64/68/80-Pin High-Performance, 64-Kbyte Enhanced Flash Microcontrollers with ECAN Module | |||
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PIC18F6585/8585/6680/8680
TABLE 27-9: PROGRAM MEMORY READ TIMING REQUIREMENTS (VDD = 4.2 TO 5.5V)
Param.
No
Symbol
Characteristics
Min
Typ
Max
Units
150 TADV2ALL Address Out Valid to ALE â (address
setup time)
0.25 TCY â 10
â
â
ns
151 TALL2ADL ALE â to Address Out Invalid (address
hold time)
5
â
â
ns
155 TALL2OEL ALE â to OE â
10
0.125 TCY
â
ns
160 TADZ2OEL AD High-Z to OE â (bus release to OE)
0
â
â
ns
161 TOEH2ADD OE â to AD Driven
0.125 TCY â 5
â
â
ns
162 TADV2OEH LS Data Valid before OE â (data setup time)
20
â
â
ns
163 TOEH2ADL OE â to Data In Invalid (data hold time)
0
â
â
ns
164 TALH2ALL ALE Pulse Width
â
0.25 TCY
â
ns
165 TOEL2OEH OE Pulse Width
0.5 TCY â 5 0.5 TCY
â
ns
166 TALH2ALH ALE â to ALE â (cycle time)
â
1 TCY
â
ns
167 TACC
Address Valid to Data Valid
0.75 TCY â 25
â
â
ns
168 TOE
OE â to Data Valid
â
0.5 TCY â 25 ns
169 TALL2OEH ALE â to OE â
0.625 TCY â 10 â 0.625 TCY + 10 ns
171 TALH2CSL Chip Select Active to ALE â
â
â
10
ns
171A TUBL2OEH AD Valid to Chip Select Active
0.25 TCY â 20
â
â
ns
FIGURE 27-9:
PROGRAM MEMORY WRITE TIMING DIAGRAM
OSC1
A<19:16>
BA0
AD<15:0>
ALE
CE
WRH or
WRL
UB or
LB
Q1
Q2
Address
150
151
171
171A
157
Q3
Q4
Address
166
Data
153
156
154
Q1
Q2
Address
Address
157A
 2004 Microchip Technology Inc.
DS30491C-page 431
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