PIC16F946 Datasheet, PDF (243/274 Pages) Microchip Technology – 64-Pin Flash-Based, 8-Bit CMOS Microcontrollers with LCD Driver and nanoWatt Technology

PIC16F946
FIGURE 19-4:
OSC1
CLKO
I/O PIN
(Input)
I/O PIN
(Output)
CLKO AND I/O TIMING
Q4
Q1
10
13
14
Q2
22
23
19 18
17
15
Old Value
20, 21
Q3
11
12
16
New Value
TABLE 19-3: CLKO AND I/O TIMING REQUIREMENTS
Standard Operating Conditions (unless otherwise stated)
Operating Temperature -40°C ≤ TA ≤ +125°C
Param
No.
Sym
Characteristic
Min
Typ† Max Units Conditions
10* TOSH2CKL OSC1↑ to CLOUT↓
11* TOSH2CKH OSC1↑ to CLOUT↑
12* TCKR
CLKO Rise Time
13* TCKF
CLKO Fall Time
14* TCKL2IOV CLKO↓ to Port Out Valid
15* TIOV2CKH Port In Valid before CLKO↑
16* TCKH2IOI Port In Hold after CLKO↑
17* TOSH2IOV OSC1↑ (Q1 cycle) to Port Out Valid
—
75
200
ns (Note 1)
—
75
200
ns (Note 1)
—
35
100
ns (Note 1)
—
35
100
ns (Note 1)
—
— 0.5 TCY + 20 ns (Note 1)
TOSC + 200 ns —
—
ns (Note 1)
0
—
—
ns (Note 1)
—
50
150*
ns
—
18* TOSH2IOI OSC1↑ (Q2 cycle) to Port
3.0-5.5V
100
Input Invalid (I/O in hold time) _2.0-5.5V
200
19* TIOV2OSH Port Input Valid to OSC1↑
0
(I/O in setup time)
—
300
ns
—
—
ns
—
—
ns
—
—
ns
20* TIOR
Port Output Rise Time
3.0-5.5V
—
10
40
ns
21* TIOF
Port Output Fall Time
2.0-5.5V
—
3.0-5.5V
—
2.0-5.5V
—
—
145
10
40
ns
—
145
22* TINP
23* TRBP
INT Pin High or Low Time
PORTA change INT High or Low Time
25
—
—
ns
TCY
—
—
ns
* 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 CLKO output is 4 x TOSC.
© 2005 Microchip Technology Inc.
Preliminary
DS41265A-page 241