Datasheet

 1997 Microchip Technology Inc. DS30444E - page 149
PIC16C9XX
FIGURE 17-4: CLKOUT AND I/O TIMING
TABLE 17-5: CLKOUT AND I/O TIMING REQUIREMENTS
Parameter
No.
Sym Characteristic Min Typ† Max Units Conditions
10* TosH2ckL OSC1↑ to CLKOUT↓ — 75 200 ns Note 1
11* TosH2ckH OSC1↑ to CLKOUT↑ — 75 200 ns Note 1
12* TckR CLKOUT rise time — 35 100 ns Note 1
13* TckF CLKOUT fall time — 35 100 ns Note 1
14* TckL2ioV CLKOUT ↓ to Port out valid — — 0.5TCY + 20 ns Note 1
15* TioV2ckH Port in valid before CLKOUT ↑ Tosc + 200 — — ns Note 1
16* TckH2ioI Port in hold after CLKOUT ↑ 0 — — ns Note 1
17* TosH2ioV OSC1↑ (Q1 cycle) to
Port out valid
— 50 150 ns
18* TosH2ioI OSC1↑ (Q2 cycle) to
Port input invalid (I/O in
hold time)
PIC16C923/924 100 — — ns
PIC16LC923/924 200 — — ns
19* TioV2osH Port input valid to OSC1↑ (I/O in setup time) 0 — — ns
20* TioR Port output rise time PIC16C923/924 — 10 40 ns
PIC16LC923/924 — — 80 ns
21* TioF Port output fall time PIC16C923/924 — 10 40 ns
PIC16LC923/924 — — 80 ns
22††* Tinp INT pin high or low time T
CY — — ns
23††* Trbp RB7:RB4 change INT high or low time TCY — — 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 asynchronous events not related to any internal clock edges.
Note 1: Measurements are taken in RC Mode where CLKOUT output is 4 x TOSC.
Refer to Figure 17-2 for load conditions.
OSC1
CLKOUT
I/O Pin
(input)
I/O Pin
(output)
Q4
Q1
Q2 Q3
10
13
14
17
20, 21
19
18
15
11
12
16
old value
new value