HT46R01A datasheet(3/58 Pages) HOLTEK

3 / 58 page

Pin Description

Pin Name

I/O

Configuration

Options

Description

PA0/AN0

I/O

Bidirectional single line I/O. The pin can be setup as a wake-up input using

the wake-up register. Software instructions determine if the pin is a CMOS

output or a Schmitt Trigger input. A pull-high resistor can be connected using

the pull-high register. PA0 is pin-shared with the AN0 input pin. The A/D input

function is selected via software instructions. If selected as an A/D input, the

I/O function and pull-high resistor functions are disabled automatically.

PA1/PFD/AN1

I/O

Bidirectional single line I/O. The pin can be setup as a wake-up input using

the wake-up register. Software instructions determine if the pin is a CMOS

output or a Schmitt Trigger input. A pull-high resistor can be connected using

the pull-high register. PA1 is pin-shared with the PFD output and the AN1 in-

put pin. The A/D input function is selected via software instructions. If selected

as an A/D input, the I/O function, PFD output and pull-high resistor functions

are disabled automatically. If the A/D function is not selected the PFD output

or I/O function selection is chosen via a bit in the CRTL0 register.

PA2/TMR0/AN2

I/O

Bidirectional single line I/O. The pin can be setup as a wake-up input using

the wake-up register. Software instructions determine if the pin is a CMOS

output or a Schmitt Trigger input. A pull-high resistor can be connected us-

ing the pull-high register. PA2 is pin-shared with the TMR0 input and the

AN2 input pin. The A/D input function is selected via software instructions. If

selected as an A/D input, the I/O function, timer input and pull-high resistor

functions are disabled automatically.

PA3/INT/AN3

I/O

Bidirectional single line I/O. The pin can be setup as a wake-up input using

the wake-up register. Software instructions determine if the pin is a CMOS

output or a Schmitt Trigger input. A pull-high resistor can be connected us-

ing the pull-high register. PA3 is pin-shared with the INT input and the AN3

input pin. The A/D input function is selected via software instructions. If se-

lected as an A/D input, the I/O function, external interrupt input and pull-high

resistor functions are disabled automatically.

PA4/PWM

I/O

Bidirectional single line I/O. The pin can be setup as a wake-up input using

the wake-up register. Software instructions determine if the pin is a CMOS

output or a Schmitt Trigger input. A pull-high resistor can be connected us-

ing the pull-high register. PA4 is pin-shared with the PWM output pin. The

PWM output or I/O function selection is chosen via a bit in CTRL0 register.

PA6/OSC1

PA5/OSC2

I/O

RC, Crystal,

RTC or I/O

Bidirectional 2-line I/O. The pins can be setup as wake-up inputs using the

wake-up register. Software instructions determine if the pins are CMOS out-

puts or Schmitt Trigger inputs. Pull-high resistors can be connected using

the pull-high register. Configuration options determine if the pins are to be

used as oscillator pins or I/O pins. Configuration options also determine

which oscillator mode is selected. The four oscillator modes are:

1. Internal RC OSC: both pins configured as I/Os.

2. External crystal OSC: both pins configured as OSC1/OSC2.

3. Internal RC + RTC OSC: both pins configured as OSC2, OSC1.

4. External RC OSC+PA5: PA6 configured as OSC1 pin, PA5 configured

as I/O.

If the internal RC OSC is selected, the frequency will be fixed at either

4MHz, 8MHz or 12MHz, dependent upon which device is chosen.

PA7/RES

PA7 or RES

Active low Schmitt trigger reset input or PA7 input. A configuration option

determines which function is selected. PA7 has a wake-up function but does

not have a pull-high function.

VDD

¾¾

Positive power supply

VSS

¾¾

Negative power supply, ground

Note:

Each pin on PA except PA7 can be selected to have a pull-high resistor.

HT46R01A

Rev. 1.10

August 13, 2008

HT46R01A датащи(PDF) 3 Page - Holtek Semiconductor Inc

HT46R01A датащи(HTML) 3 Page - Holtek 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

датащи скачать

ссылки URL