HT46R47-H Datasheet, PDF (21/42 Pages) Holtek Semiconductor Inc – Cost-Effective A/D Type 8-Bit OTP MCU

V DD
5 .5 V
V LV R
0 .9 V
0V
R e s e t S ig n a l
HT46R47-H
L V R D e te c t V o lta g e
R eset
N o r m a l O p e r a tio n
R eset
*1
*2
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 entering the normal operation.
*2: Since the low voltage has to maintain in its original state and exceed 1ms, therefore 1ms delay enter the
reset mode.
Options
The following table shows all kinds of options in the microcontroller. All of the options must be defined to ensure proper
system functioning.
No.
Options
1
WDT clock source: WDTOSC or T1 (f_SYS/4)
2 WDT function: enable or disable
3 CLRWDT instruction(s): one or two clear WDT instruction(s)
4 System oscillator: RC or crystal
5 Pull-high resistors (PA, PB, PD): none or pull-high
6 PWM enable or disable
7 PA0~PA7 wake-up: enable or disable
8 PFD enable or disable
9 Low voltage reset selection: enable or disable LVR function.
Rev. 1.30
21
March 1, 2006