TMS77C82 datasheet(24/77 Pages) TI

24 / 77 page

TMS370Cx5x

8-BIT MICROCONTROLLER

SPNS010F – DECEMBER 1986 – REVISED FEBRUARY 1997

POST OFFICE BOX 1443

• HOUSTON, TEXAS 77251–1443

digital port control registers (continued)

Table 17. Port Configuration Register Setup

INPUT

OUTPUT

FUNCTION A

FUNCTION B

(

µP MODE)

PORT

XPORT1 = 0†

XPORT2 = 0

XDATA = y

XDIR = 0

XPORT1 = 0†

XPORT2 = 0

XDATA = q

XDIR = 1

XPORT1 = 0†

XPORT2 = 1

XDATA = x

XDIR = x

XPORT1 = 1†

XPORT2 = 1

XDATA = x

XDIR = x

0–7

Data In y

Data Out q

Data Bus

Reserved

0–7

Data In y

Data Out q

Low ADDR

Reserved

0–7

Data In y

Data Out q

Hi ADDR

Reserved

Data In y

Data Out q

CSE2

CSH3

CSH2

SYSCLK

R/W

CSPF

CSH1

CSE1

OCF

—

SYSCLK

R/W

—

EDS

WAIT

XPORT1 = 1

XPORT2 =0

XDATA = x

XDIR = x

Not defined

† DPORT only

timer 1 module

The programmable timer 1 (T1) module of the TMS370Cx5x provides the designer with the enhanced timer

resources required to perform realtime system control. The T1 module contains the general-purpose timer and

the watchdog (WD) timer. The two independent 16-bit timers (T1 and WD) allow program selection of input clock

sources (real-time, external event, or pulse-accumulate) with multiple 16-bit registers (input capture and

compare) for special timer function control. The T1 module includes three external device pins that can be used

for multiple counter functions (operation mode dependent) or used as general-purpose I/O pins. T1 module is

shown in Figure 5.

TMS77C82 Datasheet(PDF) 24 Page - Texas Instruments

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