Datasheet

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