MC34708 datasheet(85/159 Pages) FREESCALE

85 / 159 page

Analog Integrated Circuit Device Data



Freescale Semiconductor

MC34708

Functional Block Description

7.8

Auxiliary Circuits

7.8.1

General Purpose I/Os

The MC34708 contains four configurable GPIO input/outputs for general purpose use. When configured as outputs, they can be

configured as open-drain (OD) or CMOS (push-pull outputs). These GPIOs are low voltage capable (1.2 or 1.8 V). In open drain

configuration these outputs can only be pulled up to 2.5 V maximum.

Each individual GPIO has a dedicated 16-bit control register. Table 78 provides detailed bit descriptions.

Table 78. GPIOLVx Control

SPI Bit

Description

DIR

GPIOLVx direction

0: Input (default)

1: Output

DIN

Input state of the GPIOLVx pin

0: Input low

1: Input High

DOUT

Output state of GPIOLVx pin

0: Output Low

1: Output High

HYS

Hysteresis

0: CMOS in

1: Hysteresis (default)

DBNC[1:0]

GPIOLVx input debounce time

00: no debounce (default)

01: 10 ms debounce

10: 20 ms debounce

11: 30 mS debounce

INT[1:0]

GPIOLVx interrupt control

00: None (default)

01: Falling edge

10: Rising edge

11: Both edges

PKE

Pad keep enable

0: Off (default)

1: On

ODE

Open drain enable

0: CMOS (default)

1: OD

DSE

Drive strength enable

0: 4.0 mA (default)

1: 8.0 mA

PUE

Pull-up/down enable

0: pull-up/down off

1: pull-up/down on (default)

MC34708 数据表(PDF) 85 Page - Freescale Semiconductor, Inc

MC34708 数据表(HTML) 85 Page - Freescale Semiconductor, 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