PIC16C774 Microchip Technology Inc., PIC16C774 Datasheet - Page 95

• Manufacturer Part Number: PIC16C774
• Description: 28/40-pin, 8-bit Cmos Microcontrollers W/ 12-bit A/d
• Manufacturer: Microchip Technology Inc.

8.3
For standard-mode I
resistors R
parameters
• Supply voltage
• Bus capacitance
• Number of connected devices
The supply voltage limits the minimum value of resistor
R
at V
FIGURE 8-42: SAMPLE DEVICE CONFIGURATION FOR I
p
(input current + leakage current).
1999 Microchip Technology Inc.
due to the specified minimum sink current of 3 mA
OL
NOTE: I 2 C devices with input levels related to V
max = 0.4V for the specified output stages. For
Connection Considerations for I
Bus
p
line to which the pull up resistor is also connected.
R
s
in
Figure 8-42
2
C bus devices, the values of
depends on the following
SDA
SCL
R
p
DD
Advance Information
must have one common supply
R
2
p
C
R
s
V
DD
DEVICE
R
+ 10%
s
example, with a supply voltage of V
V
1.7 k
The desired noise margin of 0.1V
limits the maximum value of R
optional and used to improve ESD susceptibility.
The bus capacitance is the total capacitance of wire,
connections, and pins. This capacitance limits the max-
imum value of R
(Figure
The SMP bit is the slew rate control enabled bit. This bit
is in the SSPSTAT register, and controls the slew rate
of the I/O pins when in I
OL
max = 0.4V at 3 mA, R
2
C BUS
V
8-42).
DD
as a function of R
p
due to the specified rise time
2
C mode (master or slave).
PIC16C77X
C
b
=10 - 400 pF
p min
p
is shown in Figure 8-42.
s
. Series resistors are
DD
= (5.5-0.4)/0.003 =
DD
DS30275A-page 95
for the low level
= 5V+10% and