cop8cde9 National Semiconductor Corporation, cop8cde9 Datasheet - Page 12

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cop8cde9

Manufacturer Part Number
cop8cde9
Description
8-bit Cmos Flash Microcontroller With 8k Memory, Virtual Eeprom, 10-bit A/d And Brownout Reset
Manufacturer
National Semiconductor Corporation
Datasheet
www.national.com
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 COP8CBE/CCE/CDE I/O structure enables designers to
reconfigure the microcontroller’s I/O functions with a single
instruction. 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 ex-
ample 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 elimi-
nates the need for external pull-up resistors. The high cur-
rent options are available for driving LEDs, motors and
speakers. This flexibility helps to ensure a cleaner design,
with less external components 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.
20022505
±
±
Max
0.66
V
0.5
±
±
10
6k
30
1.5
1.5
CC
7
1
2
20022570
Conversion
Cycles
Units
Clock
LSB
LSB
LSB
LSB
Bits
A/D
mA
µA
pF
µs
V

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