PIC17C42 Microchip Technology, PIC17C42 Datasheet - Page 190

• Manufacturer Part Number: PIC17C42
• Description: High-Performance 8-Bit CMOS EPROM/ROM Microcontroller
• Manufacturer: Microchip Technology

PIC17C4X
FIGURE 19-11: MEMORY INTERFACE WRITE TIMING (NOT SUPPORTED IN PIC17LC4X DEVICES)
TABLE 19-11: MEMORY INTERFACE WRITE REQUIREMENTS (NOT SUPPORTED IN PIC17LC4X
DS30412C-page 190
Applicable Devices 42 R42 42A 43 R43 44
Parameter
*
†
§
AD<15:0>
150
151
152
153
154
No.
OSC1
ALE
WR
These parameters are characterized but not tested.
Data in “Typ” column is at 5V, 25 C unless otherwise stated. These parameters are for design guidance only and are not
tested.
This specification ensured by design.
OE
Sym
TadV2alL
TalL2adI
TadV2wrL
TwrH2adI
TwrL
DEVICES)
Q1
Characteristic
AD<15:0> (address) valid to ALE
(address setup time)
ALE to address out invalid
(address hold time)
Data out valid to WR
(data setup time)
WR
(data hold time)
WR pulse width
to data out invalid
Q2
addr out
150
151
Q3
152
0.25Tcy - 10
0.25Tcy - 40
Min
—
—
0
Q4
data out
154
0.25T
0.25T
Typ†
—
—
—
CY
CY
§
§
Q1
1996 Microchip Technology Inc.
153
Max
—
—
—
—
—
Units Conditions
ns
ns
ns
ns
ns
Q2
addr out