TMS320LC2401AVFS datasheet(61/134 Pages) TI

61 / 134 page

TMS320LF2407A,TMS320LF2406A,TMS320LF2403A,TMS320LF2402A

TMS320LC2406A,TMS320LC2404A,TMS320LC2403A,TMS320LC2402A

DSP CONTROLLERS

SPRS145K − JULY 2000 − REVISED AUGUST 2005

POST OFFICE BOX 1443

• HOUSTON, TEXAS 77251−1443

digital I/O and shared pin functions (continued)

D Output Control Registers — used to control the multiplexer selection that chooses between the primary

function of a pin or the general-purpose I/O function.

D Data and Control Registers — used to control the data and data direction of bidirectional I/O pins.

description of shared I/O pins

The control structure for shared I/O pins is shown in Figure 18, where each pin has three bits that define its

operation:

D MUX control bit — this bit selects between the primary function (1) and I/O function (0) of the pin.

D I/O direction bit — if the I/O function is selected for the pin (MUX control bit is set to 0), this bit determines

whether the pin is an input (0) or an output (1).

D I/O data bit — if the I/O function is selected for the pin (MUX control bit is set to 0) and the direction selected

is an input, data is read from this bit; if the direction selected is an output, data is written to this bit.

The MUX control bit, I/O direction bit, and I/O data bit are in the I/O control registers.

(Read/Write)

IOP Data Bit

Out

0 = Input

1 = Output

MUX Control Bit

0 = I/O Function

1 = Primary Function

IOP DIR Bit

Primary

Function

or I/O Pin

Pullup

Pulldown

(Internal)

Primary

Function

(Output Section)

Primary

Function

(Input Section)

Figure 18. Shared Pin Configuration

A summary of shared pin configurations and associated bits is shown in Table 12.

TMS320LC2401AVFS датащи(PDF) 61 Page - Texas Instruments

TMS320LC2401AVFS датащи(HTML) 61 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

датащи скачать

ссылки URL