HT46R46-H

Rev. 1.40

21

March 1, 2006

0 0 0 B

0 0 0 B

1 0 0 B

0 1 0 B

S T A R T

E O C B

P C R 2 ~

P C R 0

A C S 2 ~

A C S 0

P o w e r - o n

R e s e t

E n d o f A / D

c o n v e r s i o n

1 : D e f i n e P B c o n f i g u r a t i o n

2 : S e l e c t a n a l o g c h a n n e l

S t a r t o f A / D

c o n v e r s i o n

R e s e t A / D

c o n v e r t e r

1 0 0 B

0 0 0 B

S t a r t o f A / D

c o n v e r s i o n

R e s e t A / D

c o n v e r t e r

0 0 0 B

1 . P B p o r t s e t u p a s I / O s

2 . A / D c o n v e r t e r i s p o w e r e d o f f

t o r e d u c e p o w e r c o n s u m p t i o n

1 0 1 B

0 0 1 B

S t a r t o f A / D

c o n v e r s i o n

R e s e t A / D

c o n v e r t e r

d o n ' t c a r e

E n d o f A / D

c o n v e r s i o n

E n d o f A / D

c o n v e r s i o n

M i n i m u m o n e i n s t r u c t i o n c y c l e n e e d e d , M a x i m u m t e n i n s t r u c t i o n c y c l e s a l l o w e d

N o t e :

A / D s a m p l i n g t i m e

A / D s a m p l i n g t i m e

A / D s a m p l i n g t i m e

A / D c o n v e r s i o n t i m e

A / D c o n v e r s i o n t i m e

A / D c o n v e r s i o n t i m e

A/D Conversion Timing

Low Voltage Reset

- LVR

The microcontroller provides low voltage reset circuit in

order to monitor the supply voltage of the device. If the

supply voltage of the device is within the range

0.9V~3.3V, such as changing a battery, the LVR will au-

tomatically reset the device internally.

The LVR includes the following specifications:

original state to exceed 1ms. If the low voltage state

does not exceed 1ms, the LVR will ignore it and do not

perform a reset function.

²OR² function with the external RES

signal to perform chip reset.

Note:

operation at 4MHz system clock.

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 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.

5 . 5 V

3 . 0 V

2 . 2 V

0 . 9 V

5 . 5 V