Datasheet

 1996 Microchip Technology Inc. DS30412C-page 185
PIC17C4X
Applicable Devices 42 R42 42A 43 R43 44
FIGURE 19-3: CLKOUT AND I/O TIMING
TABLE 19-3: CLKOUT AND I/O TIMING REQUIREMENTS
Parameter
No. Sym Characteristic Min Typ† Max Units Conditions
10 TosH2ckL OSC1↓ to CLKOUT↓ — 15 ‡ 30 ‡ ns Note 1
11 TosH2ckH OSC1↓ to CLKOUT↑ — 15 ‡ 30 ‡ ns Note 1
12 TckR CLKOUT rise time — 5 ‡ 15 ‡ ns Note 1
13 TckF CLKOUT fall time — 5 ‡ 15 ‡ ns Note 1
14 TckH2ioV CLKOUT ↑ to Port
out valid
PIC17CR42/42A/43/
R43/44
— — 0.5TCY + 20 ‡ ns Note 1
PIC17LCR42/42A/43/
R43/44
— — 0.5TCY + 50 ‡ ns Note 1
15 TioV2ckH Port in valid before
CLKOUT↑
PIC17CR42/42A/43/
R43/44
0.25TCY + 25 ‡ — — ns Note 1
PIC17LCR42/42A/43/
R43/44
0.25TCY + 50 ‡ — — ns Note 1
16 TckH2ioI Port in hold after CLKOUT↑ 0 ‡ — — ns Note 1
17 TosH2ioV OSC1↓ (Q1 cycle) to Port out valid — — 100 ‡ ns
18 TosH2ioI OSC1↓ (Q2 cycle) to Port input invalid
(I/O in hold time)
0 ‡ — — ns
19 TioV2osH Port input valid to OSC1↓
(I/O in setup time)
30 ‡ — — ns
20 TioR Port output rise time — 10 ‡ 35 ‡ ns
21 TioF Port output fall time — 10 ‡ 35 ‡ ns
22 TinHL INT pin high or low time 25 * — — ns
23 TrbHL RB7:RB0 change INT high or low time 25 * — — ns
* 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.
Note 1: Measurements are taken in EC Mode where CLKOUT output is 4 x T
OSC.
OSC1
OSC2 †
I/O Pin
(input)
I/O Pin
(output)
Q4
Q1
Q2 Q3
10
13
14
17
20, 21
22
23
19
18
15
11
12
16
old value
new value
† In EC and RC modes only.