HT45R34

Rev. 1.20

19

October 15, 2007

Note:

5 . 5 V

3 . 0 V

2 . 2 V

0 . 9 V

5 . 5 V

5 . 5 V

0 . 9 V

0 V

R e s e t S i g n a l

R e s e t

* 1

* 2

N o r m a l O p e r a t i o n

R e s e t

L V R D e t e c t V o l t a g e

Low Voltage Reset

Note:

*1: To make sure that the system oscillator has stabilized, the SST provides an extra delay of 1024 system

clock pulses before starting the normal operation.

the reset mode.

Options

The following table shows the various options within the microcontroller. All of the options must be defined to ensure

proper system functioning.

No.

Function

Description

1

Wake up PA0~PA7 (bit option)

None wake-up or wake-up

2

Pull high PA0~PA7 (bit option)

None pull-high or pull-high

3

WDT clock source

4

WDT

Enable or disable

5

CLRWDT

1 or 2 instructions

6

LVR

Enable or disable

7

OSC

X

¢tal mode or RC mode

8

INT0 trigger edge

Disable, rising edge, falling edge or double edge

9

INT1 trigger edge

Disable, rising edge, falling edge or double edge