HT46R01 datasheet(9/60 Pages) HOLTEK

9 / 60 page

HT46R01/HT46R02/HT46R03

Rev. 1.00

September 21, 2007

· Location 00CH

For the HT46R01 devices, this internal vector is used

by the A/D converter. When an A/D conversion cycle

is complete, the program will jump to this location and

begin execution if the A/D interrupt is enabled and the

stack is not full. For the HT46R02 and HT46R03 de-

vices, this vector is used by the Timer/Event Counter

1. If a Timer/Event Counter 1overflow occurs, the pro-

gram will jump to this location and begin execution if

the Timer/Event counter 1 interrupt is enabled and the

stack is not full.

· Location 010H

This internal vector is only used by the A/D interrupt

converter in the HT46R02 and HT46R03 devices.

When an A/D conversion cycle is complete, the pro-

gram will jump to this location and begin execution if

the A/D interrupt is enabled and the stack is not full.

Look-up Table

Any location within the Program Memory can be defined

as a look-up table where programmers can store fixed

data. To use the look-up table, the table pointer must

first be setup by placing the lower order address of the

look up data to be retrieved in the table pointer register,

TBLP. This register defines the lower 8-bit address of

the look-up table.

After setting up the table pointer, the table data can be

retrieved from the current Program Memory page or last

Program Memory page using the

²TABRDC[m]² or

²TABRDL [m]² instructions, respectively. When these in-

structions are executed, the lower order table byte from

the Program Memory will be transferred to the user de-

fined Data Memory register [m] as specified in the in-

struction. The higher order table data byte from the

Program Memory will be transferred to the TBLH special

byte will be read as

²0².

The following diagram illustrates the addressing/data

flow of the look-up table:

Table Program Example

The following example shows how the table pointer and

table data is defined and retrieved from the HT46R02

devices. This example uses raw table data located in

the last page which is stored there using the ORG state-

ment. The value at this ORG statement is

²700H² which

refers to the start address of the last page within the 2K

Program Memory of the HT46R02 microcontrollers. The

table pointer is setup here to have an initial value of

²06H². This will ensure that the first data read from the

data table will be at the Program Memory address

²706H² or 6 locations after the start of the last page.

Note that the value for the table pointer is referenced to

the first address of the present page if the

²TABRDC

[m]

² instruction is being used. The high byte of the table

data which in this case is equal to zero will be trans-

ferred to the TBLH register automatically when the

²TABRDL [m]² instruction is executed.

3 F F H

N o t I m p l e m e n t e d

1 5 b i t s

1 4 b i t s

8 0 0 H

F F F H

0 1 4 H

I n i t i a l i s a t i o n

V e c t o r

E x t e r n a l

I n t e r r u p t V e c t o r

I n i t i a l i s a t i o n

V e c t o r

E x t e r n a l

I n t e r r u p t V e c t o r

T i m e r / E v e n t C o u n t e r 0

I n t e r r u p t V e c t o r

I n i t i a l i s a t i o n

V e c t o r

E x t e r n a l

I n t e r r u p t V e c t o r

T i m e r / E v e n t C o u n t e r 0

I n t e r r u p t V e c t o r

H T 4 6 R 0 1

A / D C o n v e r t e r

I n t e r r u p t V e c t o r

A / D C o n v e r t e r

I n t e r r u p t V e c t o r

A / D C o n v e r t e r

I n t e r r u p t V e c t o r

T i m e r / E v e n t C o u n t e r 0

I n t e r r u p t V e c t o r

0 0 0 H

0 0 4 H

0 0 8 H

0 0 C H

0 1 0 H

3 0 0 H

7 F F H

4 0 0 H

H T 4 6 R 0 2

H T 4 6 R 0 3

T i m e r / E v e n t C o u n t e r 1

I n t e r r u p t V e c t o r

T i m e r / E v e n t C o u n t e r 1

I n t e r r u p t V e c t o r

Program Memory Structure

P r o g r a m

M e m o r y

P r o g r a m C o u n t e r

H i g h B y t e

T B L P

T B L H

S p e c i f i e d b y [ m ]

T a b l e C o n t e n t s H i g h B y t e

T a b l e C o n t e n t s L o w B y t e

HT46R01 Datasheet(PDF) 9 Page - Holtek Semiconductor Inc

HT46R01 Datasheet(HTML) 9 Page - Holtek Semiconductor Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60

Datasheet Download

Link URL