PIC17C42 Microchip Technology, PIC17C42 Datasheet - Page 185

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

FIGURE 19-3: CLKOUT AND I/O TIMING
TABLE 19-3:
Note 1: Measurements are taken in EC Mode where CLKOUT output is 4 x T
Parameter
1996 Microchip Technology Inc.
*
†
‡
No.
10
11
12
13
14
15
16
17
18
19
20
21
22
23
I/O Pin
(output)
OSC2 †
† In EC and RC modes only.
I/O Pin
(input)
OSC1
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.
These parameters are for design guidance only and are not tested, nor characterized.
TosH2ckL
TioV2ckH
TckH2ioI
Sym
TosH2ckH
TckR
TckF
TckH2ioV
TosH2ioV
TosH2ioI
TioV2osH
TioR
TioF
TinHL
TrbHL
CLKOUT AND I/O TIMING REQUIREMENTS
old value
Characteristic
OSC1 to CLKOUT
OSC1 to CLKOUT
CLKOUT rise time
CLKOUT fall time
CLKOUT
out valid
Port in valid before
CLKOUT
Port in hold after CLKOUT
OSC1 (Q1 cycle) to Port out valid
OSC1 (Q2 cycle) to Port input invalid
(I/O in hold time)
Port input valid to OSC1
(I/O in setup time)
Port output rise time
Port output fall time
INT pin high or low time
RB7:RB0 change INT high or low time
Q4
to Port
PIC17CR42/42A/43/
R43/44
PIC17LCR42/42A/43/
R43/44
PIC17CR42/42A/43/
R43/44
PIC17LCR42/42A/43/
R43/44
17
10
13
Q1
14
20, 21
19
0.25T
0.25T
Applicable Devices 42 R42 42A 43 R43 44
23
22
30 ‡
25 *
25 *
Min
CY
CY
0 ‡
0 ‡
—
—
—
—
—
—
—
—
—
OSC
+ 25 ‡
+ 50 ‡
18
.
Q2
15
Typ†
15 ‡
15 ‡
10 ‡
10 ‡
5 ‡
5 ‡
—
—
—
—
—
—
—
—
—
—
0.5T
0.5T
100 ‡
CY
CY
Max
30 ‡
30 ‡
15 ‡
15 ‡
35 ‡
35 ‡
—
—
—
—
—
—
—
PIC17C4X
+ 20 ‡
+ 50 ‡
11
new value
12
DS30412C-page 185
16
Units Conditions
Q3
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Note 1
Note 1
Note 1
Note 1
Note 1
Note 1
Note 1
Note 1
Note 1