Datasheet

 2003-2013 Microchip Technology Inc. DS30491D-page 99
PIC18F6585/8585/6680/8680
6.2.4 16-BIT MODE TIMING
Figure 6-4 shows the 16-bit mode external bus timing
for PIC18F8X8X devices.
FIGURE 6-4: EXTERNAL PROGRAM MEMORY BUS TIMING (16-BIT MODE)
Q2Q1 Q3 Q4 Q2Q1 Q3 Q4 Q4Q4 Q4 Q4
ALE
OE
3AABh
WRH
WRL
AD<15:0>
BA0
CF33h
Opcode Fetch
MOVLW 55h
from 007556h
9256h
0E55h
‘1’ ‘1’
‘1’
‘1’
Table Read
of 92h
from 199E67h
1 T
CY Wait
Q2Q1 Q3 Q4 Q2Q1 Q3 Q4 Q2Q1 Q3 Q4
Apparent Q
Actual Q
A<19:16>
Ch
0h
18F8680.book Page 99 Tuesday, January 29, 2013 1:32 PM