HT86B10 datasheet(53/83 Pages) HOLTEK

53 / 83 page

HT86BXX/HT86BRXX

Rev. 1.80

March 12, 2010

Voice Output

Voice Control

The voice control register controls the voice ROM circuit

and the DAC circuit and selects the Voice ROM latch

counter. If the DAC circuit is not enabled, any DAH/DAL

outputs will be invalid. Writing a

²1² to the DAC bit will

enable the enable DAC circuit, while writing a

²0² to the

DAC bit will disable the DAC circuit. If the voice ROM cir-

cuit is not enabled, then voice ROM data cannot be ac-

cessed. Writing a

²1² to the VROMC bit will enable the

voice ROM circuit, while writing a

²0² to the VROMC bit

is will disable the voice ROM circuit. The LATCH bit de-

termines which voice ROM address latch counter will be

used as the voice ROM address latch counter.

Audio Output and Volume Control

- DAL, DAH, VOL

The audio output is 12-bits wide whose highest 8-bits

are written into the DAH register and whose lowest four

bits are written into the highest four bits of the DAL regis-

ter. Bits 0~3 of the DAL register are always read as zero.

There are 8 levels of volume which are setup using the

VOL register. Only the highest 3-bits of this register are

used for volume control, the other bits are not used and

read as zero.

Voice ROM Data Address Latch Counter

The Voice ROM address is 22-bits wide (except for the

HT86B03 which has only 10-bits) and therefore requires

three registers to store the address. There are two sets

of three registers to store this address, which are

LATCH0H/LATCH0M/LATCH0L and LATCH1H/

LATCH1M/LATCH1L. The 22-bit address (except for

the HT86B03 which has only 10-bits) stored in one set of

these three registers is used to access the 8-bit voice

code data in the Voice ROM. After the 8-bit Voice ROM

data is addressed, a few instruction cycles, of at least

4us duration, are needed to latch the Voice ROM data.

After this the microcontroller can read the voice data

from the LATCHD register.

8 - b i t C o u n t e r

(

¸ 2 5 6 )

7 - b i t P r e s c a l e r

8 - t o - 1 M U X

W D T T i m e - o u t

W S 0 ~ W S 2

W D T C l o c k S o u r c e

C l e a r W D T T y p e

C o n f i g u r a t i o n O p t i o n

C L R W D T 1 F l a g

C L R W D T 2 F l a g

1 o r 2 I n s t r u c t i o n s

C L R

f S Y S / 4

W D T O s c i l l a t o r

W D T C l o c k S o u r c e

C o n f i g u r a t i o n O p t i o n

Watchdog Timer

V O I C E C R e g i s t e r

b 7

b 0

L A T C H C

V R O M C D A C

N o t i m p l e m e n t e d , r e a d a s " 0 "

D A C E n a b l e

1 : e n a b l e

0 : d i s a b l e

V o i c e R O M E n a b l e

1 : e n a b l e

0 : d i s a b l e

V o i c e R O M C o u n t e r S e l e c t

1 : A d d r e s s L a t c h 1

0 : A d d r e s s L a t c h 0

N o t i m p l e m e n t e d , r e a d a s " 0 "

VOICE Control Register

D A L R e g i s t e r

b 7

b 0

N o t u s e d , r e a d a s " 0 "

D 3

D 2

D 1

D 0

A u d i o o u t p u t

D i g i t a l t o A n a l o g D a t a L o w R e g i s t e r

D A H R e g i s t e r

b 7

b 0

D 1 1 D 1 0 D 9

D 8

A u d i o o u t p u t

D i g i t a l t o A n a l o g D a t a H i g h R e g i s t e r

V o l u m e C o n t r o l R e g i s t e r

D 7

D 6

D 5

D 4

V O L R e g i s t e r

b 7

b 0

N o t u s e d , r e a d a s " 0 "

D A v o l u m e c o n t r o l d a t a

V O L 2 V O L 1 V O L 0

U s e d b y P W M o u t p u t

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