Datasheet

PIC16C77X
DS30275B-page 162 Advance Information  1999-2013 Microchip Technology Inc.
FIGURE 15-5: CLKOUT AND I/O TIMING
TABLE 15-6 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 — — 0.5T
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——nsNote 1
17* TosH2ioV OSC1 (Q1 cycle) to
Port out valid
—50150ns
18* TosH2ioI OSC1 (Q2 cycle) to
Port input invalid (I/O in
hold time)
PIC16C77X
100 — — ns
PIC16LC77X
200 — — ns
19* TioV2osH Port input valid to OSC1(I/O in setup time) 0 — — ns
20* TioR Port output rise time
PIC16C77X
—1025ns
PIC16LC77X
——60ns
21* TioF Port output fall time
PIC16C77X
—1025ns
PIC16LC77X
——60ns
22††* Tinp INT pin high or low time T
CY ——ns
23††* Trbp RB7:RB4 change INT high or low time T
CY ——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 T
OSC.
Note: Refer to Figure 15-3 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
774.book Page 162 Tuesday, January 29, 2013 12:02 PM