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PDF N87C196MD Data sheet ( Hoja de datos )
| Número de pieza | N87C196MD | |
| Descripción | INDUSTRIAL MOTOR CONTROL MICROCONTROLLER | |
| Fabricantes | INTEL | |
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8XC196MD
Interrupt Source
Capture Compare5
Compare4
Capture Compare4
Table 3 Interrupt Sources Vectors and Priorities
Interrupt Service
PTS Service
Symbol
Name Vector Priority Name Vector Priority
CAPCOMP5 INT12 2038H 12 PTS12 2058H 27
COMP4
INT11 2036H
11
PTS11 2056H
26
CAPCOMP4 INT10 2034H 10 PTS10 2054H 25
Interrupt and PTS Vectors
The 8XC196MD has three new interrupt and PTS
vectors which are Capture Compare5 Compare 4
and Capture Compare4 Table 3 shows these inter-
rupt vectors and priorities These are shown as re-
served vectors in the 8XC196MC User’s Manual
Frequency Generator
The Frequency Generator (FG) Peripheral which
was not available on the 8XC196MC device is avail-
able on the 8XC196MD device The FG outputs a
programmable-frequency 50% duty cycle waveform
on the FREQOUT pin (P7 7) There are two 8-bit reg-
isters which control the FG peripheral
Frequency Generator Control Register
(FG CON) at 1FB8h
Frequency Generator Period Count Register
(FG COUNT) at 1FBAh
The FG CON can be read or written This register
is loaded with a value which determines the number
of counts necessary for toggling the output The fol-
lowing equation should be used to calculate the
FG CON value
FG CON value e
FXTAL
b1
16 (FG Frequency)
where FG Frequency is from 4 kHz to 1 MHz
The FG COUNT is loaded with the FG CON reg-
ister value The FG COUNT register is decrement-
ed every eighth state time When it reaches 00h the
FG COUNT register will send a signal to toggle the
output pin and reload the FG COUNT register with
the value in the FG CON register The
FG COUNT can only be read not written
The FREQOUT pin (P7 7) must be configured for a
special function to use it for the Frequency Genera-
tor feature
Port 7
Port 7 is an additional bidirectional port that was not
available on the 8XC196MC device Port 7 can be
used as I O or some of the pins have special func-
tions The pins are listed below followed by their
special functions
Table 4 Port 7 Special Function Pins
Pin Special Function
P7 0
CAPCOMP4
P7 1
CAPCOMP5
P7 2
CAPCOMP4
P7 3
CAPCOMP5
P7 4
P7 5
P7 6
P7 7
FREQOUT
The special functions of the pins are selected in the
Port 7 SFRs The Port 2 I O Port section of the
8XC196MC User’s Manual can be referenced when
setting up the Port 7 SFRs Port 7 SFRs are located
in the following locations
Table 5 Port 7 Special Function Registers
SFR
Address
P7 MODE
1FD1h
P7 DIR
1FD3h
P7 REG
1FD5h
P7 PIN
1FD7h
5
5 Page 
8XC196MD
PIN DESCRIPTIONS (Alphabetically Ordered) (Continued)
Symbol
Function
PALE
(P2 1)
A falling edge in Slave Programming Mode and Auto Configuration Byte
Programming Mode indicates that ports 3 and 4 contain valid programming
address command information (input to slave)
PROG
(P2 2)
A falling edge in Slave Programming Mode begins programming A rising edge
ends programming
PVER
(P2 0)
A high signal in Slave Programming Mode and Auto Configuration Byte
Programming Mode indicates the byte programmed correctly
CPVER
(P2 6)
Cumulative Program Verification Pin is high if all locations since entering a
programming mode have programmed correctly
AINC
(P2 4)
Auto Increment Active low input enables the auto increment mode Auto
increment will allow reading or writing of sequential EPROM locations without
address transactions across the PBUS for each read or write
11
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