HT56R656 datasheet(89/108 Pages) HOLTEK

89 / 108 page

HT56R62/HT56R65

HT56R642/HT56R644/HT56R654/HT56R656

Rev. 1.00

July 20, 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 as the application software has no control over the configuration options. All options must

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

No.

Options

Oscillator Options

High Oscillator type selection

- f

1. External Crystal Oscillator

2. External RC Oscillator

3. Externally supplied clock

- internal filter on

4. Externally supplied clock

- internal filter off

fSUB clock selection:

1. 32768Hz External Oscillator

2. 32K_INT Internal Oscillator

3fS clock selection: fSUB or fSYS/4

XTAL mode selection: 455kHz or 1M~12MHz

32768Hz Crystal: enable or disable

PFD Options

PA3: normal I/O or PFD output

PFD clock selection: Timer/Event Counter 0 or Timer/Event Counter 1

Buzzer Options

PA0/PA1: normal I/O or BZ/BZ or PA0=BZ and PA1 as normal I/O

Buzzer frequency: fS/2

2,f

S/2

3,f

S/2

4,f

S/2

5,f

S/2

6,f

S/2

7,f

S/2

8,f

S/2

Time Base Option

Time base time-out period: 2

12/f

S,2

13/f

S,2

14/f

S,2

15/f

LCD Option

LCD type: R or C

- HT56R62/HT56R65 only

Watchdog Options

Watchdog Timer function: enable or disable

CLRWDT instructions: 1 or 2 instructions

WDT time-out period: 2

12/f

S~2

13/f

S,2

13/f

S~2

14/f

S,2

14/f

S~2

15/f

S,2

15/f

S~2

16/f

LVD/LVR Options

LVD function: enable or disable

LVR function: enable or disable

LVR/LVD voltage: 2.1V/2.2V or 3.15V/3.3V or 4.2V/4.4V

SPI Options

SIM pin enable/disable

SPI_WCOL: enable/disable

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

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