Datasheet

PIC17C7XX
DS30289C-page 250  1998-2013 Microchip Technology Inc.
FIGURE 20-7: CLKOUT AND I/O TIMING
TABLE 20-2: CLKOUT AND I/O TIMING REQUIREMENTS
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.
Param
No.
Sym Characteristic Min Typ† Max Units Conditions
10 TosL2ckL OSC1 to CLKOUT — 15 30 ns (Note 1)
11 TosL2ckH 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 — — 0.5T
CY + 20 ns (Note 1)
15 TioV2ckH Port in valid before CLKOUT 0.25T
CY + 25 — — ns (Note 1)
16 TckH2ioI Port in hold after CLKOUT 0 — — ns (Note 1)
17 TosL2ioV OSC1 (Q1 cycle) to Port out valid — — 100 ns
18 TosL2ioI OSC1 (Q2 cycle) to Port input
invalid
(I/O in hold time)
0 — — ns
19 TioV2osL 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
† Data in “Typ” column is at 5V, 25°C unless otherwise stated. These parameters are for design guidance only and are not
tested.
Note 1: Measurements are taken in EC mode, where CLKOUT output is 4 x T
OSC.