HT48R06A-1(2000) 查看數據表（PDF） - Holtek Semiconductor

零件编号

产品描述 (功能)

生产厂家

HT48R06A-1
(Rev.:2000)

8-Bit OTP Microcontroller

Holtek Semiconductor 

Preliminary

HT48R06A-1

Certain locations in the program memory are

reserved for special usage:

· Location 000H

This area is reserved for program initializa-

tion. After chip reset, the program always be-

gins execution at location 000H.

· Location 004H

This area is reserved for the external inter-

rupt service program. If the INT input pin is

activated, the interrupt is enabled and the

stack is not full, the program begins execution

at location 004H.

· Location 008H

This area is reserved for the timer/event coun-

ter interrupt service program. If a timer inter-

rupt results from a timer/event counter

overflow, and if the interrupt is enabled and the

stack is not full, the program begins execution

at location 008H.

· Table location

Any location in the PROM space can be used

as look-up tables. The instructions "TABRDC

[m]" (the current page, 1 page=256 words)

and "TABRDL [m]" (the last page) transfer

the contents of the lower-order byte to the

specified data memory, and the higher-order

byte to TBLH (08H). Only the destination of

000H

D e v ic e In itia liz a tio n P r o g r a m

004H

E x te r n a l In te r r u p t S u b r o u tin e

008H

T im e r /E v e n t C o u n te r In te r r u p t S u b r o u tin e

n00H

L o o k - u p T a b le ( 2 5 6 w o r d s )

nFFH

P ro g ra m

M e m o ry

L o o k - u p T a b le ( 2 5 6 w o r d s )

3FFH

1 4 b its

N o te : n ra n g e s fro m 0 to 3

Program memory

the lower-order byte in the table is

well-defined, the other bits of the table word

are transferred to the lower portion of TBLH,

and the remaining 2 bits are read as "0". The

Table Higher-order byte register (TBLH) is

read only. The table pointer (TBLP) is a

read/write register (07H), which indicates the

table location. Before accessing the table, the

location must be placed in TBLP. The TBLH

is read only and cannot be restored. If the

main routine and the ISR (Interrupt Service

Mode

Initial Reset

External Interrupt

Timer/Event Counter Overflow

Skip

Loading PCL

Jump, Call Branch

Return from Subroutine

Note: *9~*0: Program counter bits

#9~#0: Instruction code bits

Program Counter

*9 *8 *7 *6 *5 *4 *3 *2 *1 *0

0000000000

0000000100

0000001000

PC+2

*9 *8 @7 @6 @5 @4 @3 @2 @1 @0

#9 #8 #7 #6 #5 #4 #3 #2 #1 #0

S9 S8 S7 S6 S5 S4 S3 S2 S1 S0

Program counter

S9~S0: Stack register bits

@7~@0: PCL bits

7

February 25, 2000

Share Link: