HT49R10A-1(2007) Ver la hoja de datos (PDF) - Holtek Semiconductor

Número de pieza

componentes Descripción

Fabricante

HT49R10A-1
(Rev.:2007)

LCD Type 8-Bit MCU

Holtek Semiconductor 

HT49R10A-1/HT49C10-1

Data Memory - RAM

The data memory (RAM) is designed with 79´8 bits, and

is divided into two functional groups, namely special

function registers and general purpose data memory,

most of which are readable/writeable, although some

are read only.

Of the two types of functional groups, the special func-

tion registers consist of an Indirect addressing register 0

(00H), a Memory pointer register 0 (MP0;01H), an Indi-

rect addressing register 1 (02H), a Memory pointer reg-

ister 1 (MP1;03H), a Bank pointer (BP;04H), an

Accumulator (ACC;05H), a Program counter

lower-order byte register (PCL;06H), a Table pointer

(TBLP;07H), a Table higher-order byte register

(TBLH;08H), a Real time clock control register

(RTCC;09H), a Status register (STATUS;0AH), an Inter-

rupt control register 0 (INTC0;0BH), a timer/event coun-

ter (TMR;0DH), a timer/event counter control register

(TMRC;0EH), I/O registers (PA;12H, PB;14H), and In-

terrupt control register 1 (INTC1;1EH). On the other

hand, the general purpose data memory, addressed

from 40H to 7FH, is used for data and control informa-

tion under instruction commands.

The areas in the RAM can directly handle arithmetic,

logic, increment, decrement, and rotate operations. Ex-

cept some dedicated bits, Each pin in the RAM can be

set and reset by ²SET [m].i² and ²CLR [m].i² They are

also indirectly accessible through the Memory pointer

register 0 (MP0;01H) or the Memory pointer register 1

(MP1;03H).

Indirect Addressing Register

Location 00H and 02H are indirect addressing registers

that are not physically implemented. Any read/write op-

eration of [00H] and [02H] accesses the RAM pointed to

by MP0 (01H) and MP1(03H) respectively. Reading lo-

cation 00H or 02H indirectly returns the result 00H.

While, writing it indirectly leads to no operation.

The function of data movement between two indirect ad-

dressing registers is not supported. The memory pointer

registers, MP0 (7-bit) and MP1 (7-bit), used to access

the RAM by combining corresponding indirect address-

ing registers. MP0 can only be applied to data memory,

while MP1 can be applied to data memory and LCD dis-

play memory.

Accumulator - ACC

The accumulator (ACC) is related to the ALU opera-

tions. It is also mapped to location 05H of the RAM and

is capable of operating with immediate data. The data

movement between two data memory locations must

pass through the ACC.

00H

In d ir e c t A d d r e s s in g R e g is te r 0

01H

M P0

02H

In d ir e c t A d d r e s s in g R e g is te r 1

03H

M P1

04H

BP

05H

ACC

06H

PCL

07H

TB LP

08H

TB LH

09H

R TC C

0A H

STATU S

0B H

IN T C 0

0C H

0D H

TM R

0E H

TM R C

0FH

10H

11H

12H

PA

13H

14H

PB

15H

16H

17H

18H

19H

1A H

1B H

1C H

1D H

1E H

IN T C 1

1FH

S p e c ia l P u r p o s e

D a ta M e m o ry

40H

G e n e ra l P u rp o s e

D a ta M e m o ry

(6 4 B y te s )

7FH

:U nused.

R e a d a s "0 "

RAM Mapping

Arithmetic and Logic Unit - ALU

This circuit performs 8-bit arithmetic and logic opera-

tions and provides the following functions:

· Arithmetic operations (ADD, ADC, SUB, SBC, DAA)

· Logic operations (AND, OR, XOR, CPL)

· Rotation (RL, RR, RLC, RRC)

· Increment and Decrement (INC, DEC)

· Branch decision (SZ, SNZ, SIZ, SDZ etc.)

The ALU not only saves the results of a data operation

but also changes the status register.

Rev. 1.20

8

July 27, 2007

Share Link: