TMS77C82 datasheet(2/66 Pages) TI

2 / 66 page

TMS370Cx4x

8-BIT MICROCONTROLLER

SPNS016C – NOVEMBER 1992 – REVISED FEBRUARY 1997

POST OFFICE BOX 1443

• HOUSTON, TEXAS 77251–1443

Pin Descriptions

†

NO.

TYPE†

DESCRIPTION

DIP (40)

LCC (44)

I/O

Port A pins are general-purpose bidirectional I/O ports.

I/O

Port B pins are general-purpose bidirectional I/O ports.

I/O

Port D pins are general-purpose bidirectional I/O ports.

D3 is also configurable as SYSCLK.

AN0/E0

AN1/E1

AN2/E2

AN3/E3

AN4/E4

AN5/E5

AN6/E6

AN7/E7

—

Analog-to-digital converter 1 (ADC1) analog input channels or positive reference pins; any

ADC1 channel can be programmed as general-purpose input pin (E port) if not used as an

analog input or reference channel.

VCC3

VSS3

ADC1 converter positive supply voltage and optional positive reference input pin

ADC1 converter ground supply and low reference input pin

INT1

INT2

INT3

I/O

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

External maskable interrupt input/general-purpose bidirectional pin

T1IC/CR

T1PWM

T1EVT

I/O

Timer 1 input capture/counter reset input pin/general-purpose bidirectional pin

Timer 1 pulse-width-modulation output pin/general-purpose bidirectional pin

Timer 1 external event input pin/general-purpose bidirectional pin

T2AIC1/CR

T2AIC2/PWM

T2AEVT

I/O

Timer 2A input capture/counter reset input pin/general-purpose bidirectional pin

Timer 2A input capture 2/PWM output pin/general-purpose bidirectional pin

Timer 2A external event input pin/general-purpose bidirectional pin

SCITXD

SCIRXD

SCICLK

I/O

SCI transmit data output pin/general-purpose bidirectional pin ‡

SCI receive data input pin/general-purpose bidirectional pin

SCI bidirectional serial clock pin/general-purpose bidirectional pin

RESET

I/O

System reset bidirectional pin. As input, RESET initializes microcontroller; as open-drain

output, RESET indicates detection of an internal fault by the watchdog or oscillator fault cir-

cuit.

Mode control input pin; enables the EEPROM write-protection-override (WPO) mode, also

EPROM VPP.

XTAL1

XTAL2/CLKIN

Internal-oscillator output for crystal

Internal-oscillator crystal input/external clock source input

VCC

VSS

Positive supply voltage

Ground reference

† I = input, O = output

‡ The three-pin configuration SCI is referred to as SCI1.

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