83C196MD Просмотр технического описания (PDF) - Intel

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83C196MD

INDUSTRIAL MOTOR CONTROL MICROCONTROLLER

Intel 

8XC196MD

PIN DESCRIPTIONS (Alphabetically Ordered) (Continued)

Symbol

Function

PORT2

8-bit bidirectional I O port All of the Port2 pins are shared with the EPA I O

pins (CAPCOMP0 – 3 and COMPARE0 – 3)

PORT3

PORT4

8-bit bidirectional I O ports with open drain outputs These pins are shared

with the multiplexed address data bus which uses strong internal pullups

PORT5

8-bit bidirectional I O port 7 of the pins are shared with bus control signals

(ALE INST WR RD BHE READY BUSWIDTH) Can be used as standard

IO

PORT6

8-bit output port P6 6 and P6 7 output PWM the others are used as the Wave

Form Generator outputs Can be used as standard output ports

PORT7

8-bit bidirectional I O port P7 0 – P7 3 can be used as EPA I O pins

(CAPCOMP4–5 and COMPARE4 – 5) P7 7 can be used as FREQOUT output

pin P7 4–P7 6 are standard I O pins

PWM0 PWM1

(P6 6 P6 7)

Programmable duty cycle Programmable frequency Pulse Width Modulator

pins The duty cycle has a resolution of 256 steps and the frequency can vary

from 122 Hz to 31 KHz (16 MHz input clock) Pins may be configured as

standard output if PWM is not used

RD (P5 3)

Read signal output to external memory RD is low only during external memory

reads Can be used as standard I O when not used as RD

READY (P5 6)

Ready input to lengthen external memory cycles If READY e 0 the memory

controller inserts wait states until the next positive transition of CLKOUT

occurs with READY e 1 Can be used as standard I O when not used as

READY

RESET

Reset input to and open-drain output from the chip Held low for at least 16

state times to reset the chip Input high for normal operation RESET has an

Ohmic internal pullup resistor

T1CLK

(P1 2)

Timer 1 Clock input This pin has two other alternate functions ACH10 and

P1 2

T1DIR

(P1 3)

Timer 1 Direction input This pin has two other alternate functions ACH11 and

P1 3

VPP

WG1–WG3 WG1 –WG3

(P6 0–P6 5)

The programming voltage is applied to this pin It is also the timing pin for the

return from Power Down circuit Connect this pin with a 1 mF capacitor to VSS

and a 1 MX resistor to VCC If the Power Down feature is not used connect

the pin to VCC

3 phase output signals and their complements used in motor control

applications The pins can also be configured as standard output pins

WR WRL (P5 2)

Write and Write Low output to external memory WR will go low every external

write WRL will go low only for external writes to an even byte Can be used as

standard I O when not used as WR WRL

XTAL1

Input of the oscillator inverter and the internal clock generator This pin should

be used when using an external clock source

XTAL2

Output of the oscillator inverter

PMODE

(P0 4–7)

Determines the EPROM programming mode

PACT

(P2 5)

A low signal in Auto Programming mode indicates that programming is in

process A high signal indicates programming is complete

10

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