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COP8ACC5 Datasheet(PDF) 21 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
No. de Pieza. COP8ACC5
Descripción  8-Bit CMOS ROM Based Microcontrollers with 4k Memory and High Resolution A/D
Descarga  41 Pages
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Fabricante  NSC [National Semiconductor (TI)]
Página de inicio  http://www.national.com
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COP8ACC5 Datasheet(HTML) 21 Page - National Semiconductor (TI)

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Analog Function Block (Continued)
TABLE 4. Comparator Input Selection
Control Bit
Comparator
Comparator
Output
Input Source
CMPISEL2
CMPISEL1
CMPISEL0
Neg.
Pos.
Input
Input
0
0
0
I1
I2 CH2
I3
0
0
1
I1
I2 CH2
I7
0
1
0
I1
I3 CH3
I7
0
1
1
I1
I0 CH1
I7
1
0
0
I1
I4 CH4
I7
1
0
1
I1
I5 CH5
I7
1
1
0
I1
I6 CH6
I7
111
I1
V
CC/2
I7
Ref.
Reset
The state of the Analog Block immediately after RESET is as
follows:
1.
The CMPSL Register is set to all zeros
2.
The Comparator is disabled
3.
The Constant Current Source is disabled
4.
CMPNEG is turned off
5.
The Port I inputs are electrically isolated from the com-
parator
6.
The Capture Timer input is connected to GND
7.
CMPISEL0–CMPISEL2 are set to zero
8.
All Port I inputs are selected to the default digital input
mode
The comparator outputs have the same specification as
Ports L and G except that the rise and fall times are sym-
metrical.
Interrupts
INTRODUCTION
Each device supports eight vectored interrupts. Interrupt
sources include Timer 0, Timer 1, Timer 2, Timer 3, Port L
Wakeup, Software Trap, MICROWIRE/PLUS, and External
Input.
All interrupts force a branch to location 00FF Hex in program
memory. The VIS instruction may be used to vector to the
appropriate service routine from location 00FF Hex.
The Software trap has the highest priority while the default
VIS has the lowest priority.
Each of the 8 maskable inputs has a fixed arbitration ranking
and vector.
Figure 14 shows the Interrupt Block Diagram.
www.national.com
21


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