TMS77C82 datasheet(2/77 Pages) TI

2 / 77 page

TMS370Cx5x

8-BIT MICROCONTROLLER

SPNS010F – DECEMBER 1986 – REVISED FEBRUARY 1997

POST OFFICE BOX 1443

• HOUSTON, TEXAS 77251–1443

Pin Descriptions

†

‡

NAME

ALTERNATE

FUNCTION

SDIP

(64)

LCC

(68)

I/O†

DESCRIPTION‡

DATA0

DATA1

DATA2

DATA3

DATA4

DATA5

DATA6

DATA7

I/O

Single-chip mode: Port A is a general-purpose bidirectional I/O port.

Expansion mode: Port A can be individually programmed as the external

bidirectional data bus (DATA0 – DATA7).

ADDR0

ADDR1

ADDR2

ADDR3

ADDR4

ADDR5

ADDR6

ADDR7

I/O

Single-chip mode: Port B is a general-purpose bidirectional I/O port.

Expansion mode: Port B can be individually programmed as the low-order address

output bus (ADDR0 – ADDR7).

ADDR8

ADDR9

ADDR10

ADDR11

ADDR12

ADDR13

ADDR14

ADDR15

I/O

Single-chip mode: Port C is a general-purpose bidirectional I/O port.

Expansion mode: Port C can be individually programmed as the high-order address

output bus (ADDR8 – ADDR15).

INT1

INT2

INT3

NMI

—

I/O

External (nonmaskable or maskable) interrupt/general-purpose input pin

External maskable interrupt input/general-purpose bidirectional pin

AN0

AN1

AN2

AN3

AN4

AN5

AN6

AN7

ADC1 analog input (AN0 – AN7) or positive reference pins (AN1 – AN7)

Port E can be individually programmed as general-purpose input pins if not used

as ADC1 analog input or positive reference input.

VCC3

VSS3

ADC1 positive-supply voltage and optional positive-reference input pin

ADC1 ground reference pin

RESET

I/O

System reset bidirectional pin. RESET, as an input, initializes the microcontroller;

as open-drain output, RESET indicates an internal failure was detected by the

watchdog or oscillator fault circuit.

Mode control (MC) pin. MC enables EEPROM write-protection override (WPO)

mode, also EPROM VPP.

XTAL2/CLKIN

XTAL1

Internal oscillator crystal input / external clock source input

Internal oscillator output for crystal

VCC1

31, 57

33,

Positive supply voltage

VCC2

—

15,63

Positive supply voltage

† I = input, O = output

‡ Ports A, B, C, and D can be configured only as general-purpose I/O pins. Also, port D3 can be configured as SYSCLK.

TMS77C82 Datasheet(PDF) 2 Page - Texas Instruments

TMS77C82 Datasheet(HTML) 2 Page - Texas Instruments

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