cop8cfe9 National Semiconductor Corporation, cop8cfe9 Datasheet - Page 12

• Manufacturer Part Number: cop8cfe9
• Description: 8-bit Cmos Flash Microcontroller With 8k Memory, Virtual Eeprom, And 10-bit A/d
• Manufacturer: National Semiconductor Corporation

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Resolution
DNL
INL
Offset Error
Gain Error
Input Voltage Range
Analog Input Leakage Current
Analog Input Resistance (Note 9)
Analog Input Capacitance
Conversion Clock Period
Conversion Time (including S/H Time)
Operating Current on AV
Note 17: Resistance between the device input and the internal sample and hold capacitance.
3.0 Pin Descriptions
The COP8CFE I/O structure enables designers to reconfig-
ure the microcontroller’s I/O functions with a single instruc-
tion. Each individual I/O pin can be independently configured
as output pin low, output high, input with high impedance or
input with weak pull-up device. A typical example is the use
of I/O pins as the keyboard matrix input lines. The input lines
can be programmed with internal weak pull-ups so that the
input lines read logic high when the keys are all open. With
a key closure, the corresponding input line will read a logic
zero since the weak pull-up can easily be overdriven. When
the key is released, the internal weak pull-up will pull the
input line back to logic high. This eliminates the need for
external pull-up resistors. The high current options are avail-
able for driving LEDs, motors and speakers. This flexibility
helps to ensure a cleaner design, with less external compo-
nents and lower costs. Below is the general description of all
available pins.
V
pins must be connected.
Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis.
CC
and GND are the power supply pins. All V
Parameter
A/D Converter Electrical Characteristics (−40˚C
CC
FIGURE 1. MICROWIRE/PLUS Timing
V
V
V
V
4.5V
4.5V
AV
CC
CC
CC
CC
CC
CC
and GND
= 5V
= 5V
= 5V
= 5V
Conditions
= 5.5V
V
V
CC
CC
<
<
5.5V
5.5V
12
Users of the LLP package are cautioned to be aware that the
central metal area and the pin 1 index mark on the bottom of
the package may be connected to GND. See figure below:
T
A
Min
0.8
+125˚C) (Single-ended mode only)
0
Typ
0.2
15
FIGURE 2.
20026405
±
±
Max
0.66
V
0.5
±
±
10
6k
30
1.5
1.5
CC
7
1
2
20026475
Conversion
Cycles
Units
Clock
LSB
LSB
LSB
LSB
Bits
A/D
mA
µA
pF
µs
V