PIC16C54/55/56/57
PIC16C5X
FIGURE 11-3: CLKOUT AND I/O TIMING - PIC16C54/55/56/57
Q1
Q2
Q3
Q4
OSC1
10
11
CLKOUT
13
12
16
18
14
19
I/O Pin
(input)
15
17
I/O Pin
(output)
New Value
Old Value
20, 21
Note: All tests must be done with specified capacitive loads (see data sheet) 50 pF on I/O pins and CLKOUT.
TABLE 11-4: CLKOUT AND I/O TIMING REQUIREMENTS - PIC16C54/55/56/57
AC Characteristics
Standard Operating Conditions (unless otherwise specified)
Operating Temperature
0°C ≤ TA ≤ +70°C (commercial)
–40°C ≤ TA ≤ +85°C (industrial)
–40°C ≤ TA ≤ +125°C (extended)
Operating Voltage VDD range is described in Section 11.1, Section 11.2 and
Section 11.3
Parameter
(1)
No.
Sym
Characteristic
(2)
Min
Typ
Max
Units
10
11
12
13
14
15
16
17
18
TosH2ckL
TosH2ckH
TckR
OSC1↑ to CLKOUT↓
—
15
15
5
30**
30**
15**
15**
40**
—
ns
ns
ns
ns
ns
ns
ns
ns
ns
(2)
OSC1↑ to CLKOUT↑
—
(2)
CLKOUT rise time
—
(2)
TckF
CLKOUT fall time
—
5
(2)
CLKOUT↓ to Port out valid
TckL2ioV
TioV2ckH
TckH2ioI
TosH2ioV
TosH2ioI
—
—
—
—
—
—
(2)
Port in valid before CLKOUT↑
(2)
0.25 TCY+30*
Port in hold after CLKOUT↑
OSC1↑ (Q1 cycle) to Port out valid
0*
—
—
(3)
100*
—
OSC1↑ (Q2 cycle) to Port input invalid
TBD
(I/O in hold time)
19
TioV2osH
Port input valid to OSC1↑
TBD
—
—
ns
(I/O in setup time)
(3)
20
21
TioR
TioF
Port output rise time
—
—
10
10
25**
25**
ns
ns
(3)
Port output fall time
*
These parameters are characterized but not tested.
** These parameters are design targets and are not tested. No characterization data available at this time.
Note 1: Data in the Typical (“Typ”) column is at 5.0V, 25°C unless otherwise stated. These parameters are for design guidance
only and are not tested.
2: Measurements are taken in RC Mode where CLKOUT output is 4 x TOSC.
3: See Figure 11-1 for loading conditions.
1998 Microchip Technology Inc.
Preliminary
DS30453B-page 77
MICROCHIP [ MICROCHIP ]
