HT56RB688_13 datasheet(10/164 Pages) HOLTEK

10 / 164 page

Pin Description

The following table depicts the pins common to all devices.

Pin Name

I/O

Configuration

Option

Description

Input/Output

PA0/BZ/INT0/AN0

PA1/BZ/INT1/AN1

PA2/AUD/AN2

PA3/PFD/AN3

PA4/TMR2/AN4

PA5/TMR3/PWM3/AN5

PA6/TMR0/AN6

PA7/TMR1/AN7/VREF

I/O

BZ/BZ

PFD

Bidirectional 8-bit input/output port. Each individual bit on this port

can be configured as a wake-up input by the PAWU register control

bit. Software instructions determine if the pin is a CMOS output or

Schmitt Trigger input. A pull-high resistor can be connected to each

pin determined by the PAPU register.

Port A is pin-shared with the A/D input pins. The A/D inputs are

selected via software instructions. Once a Port A line is selected as

an A/D input, the I/O function and pull-high resistor are disabled

automatically.

The BZ/INT0, BZ/INT1, PFD, TMR2, TMR3/PWM3, TMR0 and

TMR1 are pin-shared with PA0, PA1, PA3 and PA4~PA7

respectively.

AUD is the audio output pin from the D/A Converter and pin-shared

with PA2. When the D/A-Converter is enabled, the PA2 I/O function

will be disabled automatically, including any pull-high resistors. If the

D/A Converter output, AUD, and the A/D Converter input, AN2, are

both enabled, then the D/A converter output will be connected to the

AN2 input channel allowing the D/A output to be measured by the

A/D Converter.

VREF is the ADC reference voltage input pin. The

²VREFS² bit in the

ACSR register is used to select either VREF or AVDD as the ADC

reference voltage.

PB0/SCK0/SCL0

PB1/SDI0/SDA0

PB2/SDO0

PB3/VDDIO *

PB4/SDO1

PB5/SDI1/SDA1

PB6/SCK1/SCL1

PB7/SCS1

I/O

VDDIO

SIM0

SIM1

Bidirectional 8-bit input/output port. Software instructions determine

if the pin is a CMOS output or Schmitt trigger input. A pull-high

resistor can be connected to each pin by the PBPU register.

SDO1, SDI1/SDA1, SCK1/SCL1 and SCS1 are the the SIM1

interface pins, pin-shared with PB4~PB7 respectively and enabled

by a configuration option, as well as the SIM0 interface pins. When

the configuration option enables the SIM function, the I/O function

will be disabled.

The VDDIO pin is an alternate power input pin for certain interface

functions, for example the 3.3V MXIC serial Flash Memory. It is

pin-shared with PB3. A Configuration option is used to determine if

PB3 is selected to be an I/O pin or the alternate power pin VDDIO.

When PB3 is selected as an alternate power pin, VDDIO, the power

supply of all the pins on this port, except PB3, together with PC4 can

be selected individually to come from the VDD pin or from VDDIO by

configuration options.

Rev. 1.10

April 15, 2013

HT56RB688

TinyPowerTM A/D type Smart Card OTP MCU

with LCD, DAC, ISO 7816 and USB Interfaces

HT56RB688 Datasheet(PDF) 10 Page - Holtek Semiconductor Inc

HT56RB688 Datasheet(HTML) 10 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 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

Datasheet Download

Link URL