PIC18F6X2X Datasheet, PDF (344/386 Pages) Microchip Technology – 64/80-Pin High Performance, 64-Kbyte Enhanced FLASH Microcontrollers with A/D

PIC18F6X2X/8X2X
FIGURE 27-8:
PROGRAM MEMORY WRITE TIMING DIAGRAM
Q1
Q2
Q3
Q4
OSC1
A<19:16>
BA0
AD<15:0>
ALE
CE
WRH or
WRL
UB or LB
Address
150
151
171
171A
157
Address
166
Data
153
156
154
Q1
Q2
Address
Address
157A
Operating Conditions: 2.0V < VCC < 5.5V, -40°C < TA < 125°C unless otherwise stated.
TABLE 27-10: PROGRAM MEMORY WRITE TIMING REQUIREMENTS
Param.
No
Symbol
Characteristics
Min
Typ Max
150 TadV2alL Address out valid to ALE ↓ (address setup time)
0.25 TCY – 10 —
—
151 TalL2adl ALE ↓ to address out invalid (address hold time)
5
—
—
153 TwrH2adl WRn ↑ to data out invalid (data hold time)
5
—
—
154 TwrL
WRn pulse width
0.5 TCY – 5 0.5 TCY —
156 TadV2wrH Data valid before WRn ↑ (data setup time)
0.5 TCY – 10 —
—
157 TbsV2wrL Byte select valid before WRn ↓ (byte select setup time) 0.25 TCY
—
—
157A TwrH2bsI WRn ↑ to byte select invalid (byte select hold time) 0.125 TCY – 5 —
—
166 TalH2alH ALE ↑ to ALE ↑ (cycle time)
—
0.25 TCY —
171 TalH2csL Chip Enable active to ALE ↓
0.25 TCY – 20 —
—
171A TubL2oeH AD valid to Chip Enable active
—
—
10
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
DS39612A-page 342
Advance Information
 2003 Microchip Technology Inc.