HT95R35 datasheet(56/73 Pages) HOLTEK

56 / 73 page

HT95R35

Rev. 1.00

October 7, 2009

Configuration Options

Configuration options refer to certain options within the MCU that are programmed into the device during the program-

ming process. During the development process, these options are selected using the HT-IDE software development

tools. As these options are programmed into the device using the hardware programming tools, once they are selected

they cannot be changed later by the application software.

All options must be defined for proper system function, the details of which are shown in the table.

Name

Options

Wake-up PA

Port A wake-up selection.

Define the activity of wake-up function.

All port A have the capability to wake-up the chip from a HALT.

This wake-up function is selected per bit.

Pull-high PA

Pull-high PC0~PC1

Pull-high PC4~PC7

Pull-high PD

Pull-high PE

Pull-high PF

Pull-high PG

Pull-high option.

This option determines whether the pull-high resistance is viable or not.

Port A pull-high option is selected per bit.

Port C pull-high option is selected per bit.

Port D pull-high option is selected per nibble.

Port E pull-high option is selected per nibble.

Port F pull-high option is selected per nibble.

Port G pull-high option is selected per nibble.

CLRWDT

This option defines how to clear the WDT by instruction.

One clear instruction

® The ²CLR WDT² can clear the WDT.

Two clear instructions

® Only when both of the ²CLR WDT1² and ²CLR WDT2² have been ex-

ecuted, then WDT can be cleared.

WDT

Watchdog enable/disable

WDT Clock Source

WDT clock source selection

® Select the WDT OSC to be the WDT source.

® Select the instruction clock to be the WDT source.

32kHz

® Select the external 32768Hz to be the WDT source.

LVR

Low Voltage Reset enable or disable

LVR Voltage

Low Voltage Reset voltage; 2.1V, 3.15V or 4.2V

SPI Options

SIM

Enable/disable

SPI_WCOL

Enable/disable

SPI_CSEN

Enable/disable, used to enable/disable (1/0) software CSEN function

2C Option

2C debounce Time No debounce, 1 system clock debounce, 2 system clock debounce

AUD Option

DAC output

Enable/disable

HT95R35 Datasheet(PDF) 56 Page - Holtek Semiconductor Inc

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