PIC17C7XX_13 Datasheet, PDF (265/306 Pages) Microchip Technology – High-Performance 8-bit CMOS EPROM Microcontrollers with 10-bit A/D

PIC17C7XX
FIGURE 20-24: MEMORY INTERFACE WRITE TIMING
Q1
Q2
Q3
Q4
Q1
OSC1
ALE
OE
WR
AD<15:0>
151
150
addr out
154
data out
152
153
Q2
addr out
TABLE 20-20: MEMORY INTERFACE WRITE REQUIREMENTS
Param.
No.
Sym
Characteristic
150 TadV2alL AD<15:0> (address) valid PIC17CXXX
to
ALE (address setup
time)
PIC17LCXXX
151 TalL2adI ALE to address out invalid PIC17CXXX
(address hold time)
PIC17LCXXX
152 TadV2wrL Data out valid to WR
PIC17CXXX
(data setup time)
PIC17LCXXX
153 TwrH2adI WR to data out invalid PIC17CXXX
154
†
(data hold time)
PIC17LCXXX
TwrL
WR pulse width
PIC17CXXX
PIC17LCXXX
Data in “Typ” column is at 5V, 25C unless otherwise stated.
Min
0.25TCY - 10
0.25TCY - 10
0
0
0.25TCY - 40
0.25TCY - 40
—
—
—
—
Typ†
—
—
—
—
—
—
0.25TCY
0.25TCY
0.25TCY
0.25TCY
Max
Unit
s
Conditions
—
ns
—
—
ns
—
—
ns
—
—
ns
—
—
ns
—
 1998-2013 Microchip Technology Inc.
DS30289C-page 265