PIC16F688
FIGURE 14-5:
CLKOUT AND I/O TIMING
Cycle
Write
Q4
Fetch
Q1
Read
Q2
Execute
Q3
FOSC
OS12
OS18
OS11
OS20
OS21
CLKOUT
OS19
OS13
OS16
OS17
I/O pin
(Input)
OS14
OS15
I/O pin
(Output)
New Value
Old Value
OS18, OS19
TABLE 14-3: CLKOUT AND I/O TIMING PARAMETERS
Standard Operating Conditions (unless otherwise stated)
Operating Temperature -40°C ≤ TA ≤ +125°C
Param
No.
Sym
Characteristic
Min
Typ† Max Units
Conditions
OS11
OS12
OS13
OS14
TOSH2CKL FOSC↑ to CLKOUT↓ (1)
TOSH2CKH FOSC↑ to CLKOUT↑ (1)
—
—
—
—
70
72
20
—
70
—
ns VDD = 5.0V
—
—
—
50
—
ns VDD = 5.0V
ns
TCKL2IOV
TIOV2CKH Port input valid before CLKOUT↑(1)
CLKOUT↓ to Port out valid(1)
TOSC + 200 ns
ns
OS15* TOSH2IOV FOSC↑ (Q1 cycle) to Port out valid
—
ns VDD = 5.0V
ns VDD = 5.0V
OS16
OS17
OS18
OS19
TOSH2IOI
FOSC↑ (Q2 cycle) to Port input invalid
(I/O in hold time)
50
TIOV2OSH Port input valid to FOSC↑ (Q2 cycle)
20
—
—
ns
(I/O in setup time)
TIOR
TIOF
Port output rise time(2)
—
—
15
40
72
32
ns VDD = 2.0V
VDD = 5.0V
Port output fall time(2)
—
—
28
15
55
30
ns VDD = 2.0V
VDD = 5.0V
OS20* TINP
OS21* TRAP
INT pin input high or low time
25
—
—
—
—
ns
ns
PORTA interrupt-on-change new input
level time
TCY
*
These parameters are characterized but not tested.
Data in “Typ” column is at 5.0V, 25°C unless otherwise stated.
†
Note 1: Measurements are taken in RC mode where CLKOUT output is 4 x TOSC.
2: Includes OSC2 in CLKOUT mode.
© 2007 Microchip Technology Inc.
DS41203D-page 155
MICROCHIP [ MICROCHIP ]
