83C196MD datasheet(5/25 Pages) INTEL

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8XC196MD

Table 3 Interrupt Sources Vectors and Priorities

Interrupt Service

PTS Service

Interrupt Source

Symbol

Name

Vector

Priority

Name

Vector

Priority

CaptureCompare5

CAPCOMP5

INT12

2038H

PTS12

2058H

Compare4

COMP4

INT11

2036H

PTS11

2056H

CaptureCompare4

CAPCOMP4

INT10

2034H

PTS10

2054H

Interrupt and PTS Vectors

The 8XC196MD has three new interrupt and PTS

vectors which are CaptureCompare5 Compare 4

and CaptureCompare4 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 (P77) 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

CON value

CON value e

FXTAL

(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

COUNT register will send a signal to toggle the

output pin and reload the FG

COUNT register with

the

value

the

CON

The

COUNT can only be read not written

The FREQOUT pin (P77) 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 IO 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

Special Function

P70

CAPCOMP4

P71

CAPCOMP5

P72

CAPCOMP4

P73

CAPCOMP5

P74

P75

P76

P77

FREQOUT

The special functions of the pins are selected in the

Port 7 SFRs The Port 2 IO 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

MODE

1FD1h

DIR

1FD3h

REG

1FD5h

1FD7h

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