ZUSBOPTSC01ZACG datasheet(70/282 Pages) ZILOG

70 / 282 page

PS022827-1212

P R E L I M I N A R Y

GPIO Control Register Definitions

Z8 Encore! XP® F082A Series

Product Specification

LED Drive Enable Register

The LED Drive Enable Register, shown in Table 31, activates the controlled current drive.

The Alternate Function Register has no control over the LED function; therefore, setting

the Alternate Function Register to select the LED function is not required. LEDEN bits

[7:0] correspond to Port C bits [7:0], respectively.

LED Drive Level High Register

The LED Drive Level registers contain two control bits for each Port C pin, as shown in

Table 32. These two bits select between four programmable drive levels. Each pin is indi-

vidually programmable.

Table 31. LED Drive Enable (LEDEN)

Bit

Field

LEDEN[7:0]

RESET

00000000

R/W

R/WR/W

R/WR/WR/WR/WR/WR/W

Address

F82H

Bit

Description

[7:0]



LEDENx

LED Drive Enable

These bits determine which Port C pins are connected to an internal current sink.

0 = Tristate the Port C pin.

1 = Enable controlled current sink on the Port C pin.

Note: x indicates the specific GPIO port pin number (7–0).

Table 32. LED Drive Level High Register (LEDLVLH)

Bit

Field

LEDLVLH[7:0]

RESET

00000000

R/W

R/WR/W

R/WR/WR/WR/WR/WR/W

Address

F83H

Bit

Description

[7:0]



LEDLVLHx

LED Level High Bit

{LEDLVLH, LEDLVLL} select one of four programmable current drive levels for each Port C pin.

00 = 3mA

01 = 7mA

10 = 13mA

11 = 20mA

Note: x indicates the specific GPIO port pin number (7–0).

ZUSBOPTSC01ZACG 数据表(PDF) 70 Page - Zilog, Inc.

ZUSBOPTSC01ZACG 数据表(HTML) 70 Page - Zilog, Inc.

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

数据表下载