PIC16LC74B-16 Datasheet, PDF (13/41 Pages) Microchip Technology – 8-Bit CMOS Microcontrollers with A/D Converter

PIC16LC74B-16/PTL16
FIGURE 2-4:
OSC1
CLKOUT AND I/O TIMING
Q4
Q1
10
Q2
Q3
11
CLKOUT
13
14
19
18
I/O Pin
(input)
17
15
I/O Pin
(output)
old value
20, 21
Note: Refer to Figure 2.1 for load conditions.
12
16
new value
TABLE 2-3: CLKOUT AND I/O TIMING REQUIREMENTS
Param
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
18A* TosH2ioI OSC1↑ (Q2 cycle) to Port input invalid (I/O in hold time) 200
—
—
ns
19*
TioV2osH Port input valid to OSC1↑ (I/O in setup time)
0
—
—
ns
20A* TioR
Port output rise time
—
—
80
ns
21A* TioF
Port output fall time
—
—
80
ns
22††* Tinp
INT pin high or low time
TCY
—
—
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 3V, 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 edge.
Note 1: Measurements are taken in RC mode where CLKOUT output is 4 x TOSC.
© 1999 Microchip Technology Inc.
Preliminary
DS30026A-page 13