HT46R14 datasheet(3/47 Pages) HOLTEK

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Pin Description

Pin Name

I/O

Option

Description

PA0/PPG1

PA1~PA2

PA3/PFD

PA4/TMR0

PA5/INT0

PA6/INT1

PA7/TMR1

I/O

Pull-high

Wake-up

PA3 or PFD

Bidirectional 8-bit input/output port. Each bit can be configured as wake-up in-

put by options. Software instructions determine the CMOS output or Schmitt

trigger input with or without pull-high resistor (determined by pull-high option:

bit option).

The PFD, INT0 and INT1 are pin-shared with PA3, PA5 and PA6. The TMR0

is pin-shared with PA4, TMR1 is pin shared with PA7, respectively.

The PPG1 is a programmable pulse generator1 output pin, pin shared with

PA0. The PPG1 or I/O function is selected via configuration option. The PPG1

output pin is floating during power-on reset, RES pin reset or LVR reset. The

PPG1 output level (active low or active high) can be selected via configuration

option.

PB0/AN0~

PB7/AN7

I/O

Pull-high

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

CMOS output, Schmitt trigger input with or without pull-high resistor (deter-

mined by pull-high option: bit option) or A/D input.

Once a PB line is selected as an A/D input (by using software control), the I/O

function and pull-high resistor are disabled automatically.

PC0/C0VIN-

PC1/C0VIN+

PC2/C0OUT

PC3/C1OUT

C1VIN+

C1VIN-

I/O

Pull-high

I/O or

Comparator

Bidirectional 4-bit input/output port. Software instructions determine the

CMOS output, Schmitt trigger input with or without pull-high resistor (deter-

mine by pull-high option: byte option).

C0VIN+, C0VIN- and C0OUT are pin-shared with PC1, PC0 and PC2. Once

the Comparator 0 function is used, the internal registers related to PC1, PC0

cannot be used, PC2 can be used as input only, the PC1, PC0 I/O function,

PC2 output function and pull-high resistor are disabled automatically. Soft-

ware instructions determine the Comparator 0 function to be used.

C1VIN+ and C1VIN- are Comparator 1 input, C1OUT is pin-shared with PC3.

Once the Comparator 1 function is used, the internal register related to PC3

can be used as input only, the PC3 output function and pull-high resistor are

disabled automatically. Software instructions determine the Comparator 1

function to be used.

PPG0

This is a programmable pulse generator 0 output pin, the pin is floating during

power-on reset, RES pin reset or LVR reset. The PPG0 output level (active

low or active high) can be selected via configuration option

OSC1

OSC2

Crystal

or RC

OSC1, OSC2 are connected to an RC network or a Crystal (determined by op-

tions) for the internal system clock. In the case of RC operation, OSC2 is the

output terminal for 1/4 system clock.

RES

Schmitt trigger reset input. Active low.

VDD

¾¾

Positive power supply

VSS

¾¾

Negative power supply, ground

Absolute Maximum Ratings

Supply Voltage ...........................VSS

-0.3V to VSS+6.0V

Storage Temperature ............................

-50°Cto125°C

Input Voltage..............................VSS

-0.3V to VDD+0.3V

Operating Temperature...........................

-40°Cto85°C

Note: These are stress ratings only. Stresses exceeding the range specified under

²Absolute Maximum Ratings² may

cause substantial damage to the device. Functional operation of this device at other conditions beyond those

listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliabil-

ity.

HT46R14

Rev. 1.00

November 1, 2005

HT46R14 Datasheet(PDF) 3 Page - Holtek Semiconductor Inc

HT46R14 Datasheet(HTML) 3 Page - Holtek Semiconductor Inc

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