PIC16F684T-I Datasheet, PDF (143/192 Pages) Microchip Technology – 14-Pin, Flash-Based 8-Bit CMOS Microcontrollers

FIGURE 15-5:
CLKOUT AND I/O TIMING
Cycle
Fosc
CLKOUT
Write
Q4
I/O pin
(Input)
I/O pin
(Output)
Old Value
Fetch
Q1
OS11
OS19
OS13
Read
Q2
OS20
OS21
OS16
OS17
OS15
OS18, OS19
OS14
PIC16F684
Execute
Q3
OS12
OS18
New Value
TABLE 15-3: 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
OS11 TOSH2CKL FOSC↑ to CLKOUT↓ ⁽¹⁾
—
— 70
OS12 TOSH2CKH FOSC↑ to CLKOUT↑ ⁽¹⁾
—
— 72
OS13 TCKL2IOV CLKOUT↓ to Port out valid⁽¹⁾
—
— 20
OS14 TIOV2CKH Port input valid before CLKOUT↑⁽¹⁾ TOSC + 200 ns — —
OS15 TOSH2IOV FOSC↑ (Q1 cycle) to Port out valid
—
50 70*
OS16 TOSH2IOI FOSC↑ (Q2 cycle) to Port input invalid
50
(I/O in hold time)
——
OS17
OS18
TIOV2OSH
TIOR
Port input valid to FOSC↑ (Q2 cycle)
(I/O in setup time)
Port output rise time⁽²⁾
OS19 TIOF
Port output fall time⁽²⁾
20
——
—
15 72
—
40 32
—
28 55
—
15 30
OS20* TINP
INT pin input high or low time
25
——
OS21* TRAP
PORTA interrupt-on-change new input
TCY
level time
——
*
†
Note 1:
2:
These parameters are characterized but not tested.
Data in ‘Typ’ column is at 5.0V, 25°C unless otherwise stated.
Measurements are taken in RC mode where CLKOUT output is 4 x TOSC.
Includes OSC2 in CLKOUT mode.
Units Conditions
ns VDD = 5.0V
ns VDD = 5.0V
ns
ns
ns VDD = 5.0V
ns VDD = 5.0V
ns
ns VDD = 2.0V
VDD = 5.0V
ns VDD = 2.0V
VDD = 5.0V
ns
ns
© 2007 Microchip Technology Inc.
DS41202F-page 141