HT36F2 datasheet(14/36 Pages) HOLTEK

14 / 36 page

HT36F2

Rev. 1.00

August 15, 2005

C K

D a t a B u s

W r i t e C o n t r o l R e g i s t e r

C h i p R e s e t

R e a d C o n t r o l R e g i s t e r

W r i t e I / O

R e a d I / O

S y s t e m W a k e - U p

W e a k

P u l l - u p

M a s k O p t i o n

V D D

I / O L i n e

Input/Output Ports

Channel Wavetable Synthesizer

Name

Function

1DH

DAC high byte (no default value)

DA15

DA14

DA13

DA12

DA11

DA10

DA9

DA8

1EH

DAC low byte (no default value)

DA7

DA6

DA5

DA4

DA3

DA2

DA1

DA0

1FH

DAON=1: DAC ON

DAON=0: DAC OFF (default)

SELW=1: DAC data from wavetable

SELW=0: DAC data from MCU

¾¾¾¾¾¾

DAON SELW

20H

Channel number selection

CH2

CH1

CH0

21H

High byte frequency number

BL3

BL2

BL1

BL0

FR11

FR10

FR9

FR8

22H

Low byte frequency number

FR7

FR6

FR5

FR4

FR3

FR2

FR1

FR0

23H

High byte start address

ST12

ST11

ST10

ST9

ST8

24H

Low byte start address

ST7

ST6

ST5

ST4

ST3

ST2

ST1

ST0

25H

Wave bit select,

High byte repeat number

WBS

RE12

RE11

RE10

RE9

RE8

26H

Low byte repeat number

RE7

RE6

RE5

RE4

RE3

RE2

RE1

RE0

27H

Envelope control,

Volume control

A_R

ENV1

ENV0

VR9

VR8

28H~29H

Unused

2AH

Volume control

VR7

VR6

VR5

VR4

VR3

VR2

VR1

VR0

2BH~2FH

Unused

30H~FFH

Data memory (RAM)

General purpose data memory (same as 8-Bit MCU)

Memory Map (20H~FFH) Register

Note:

²¾² No function, read only, read as ²0².

Unused: No function, read only, read as

²0².

· CH1~CH0 channel number selection

The HT36F2 has a built-in 8 output channels and

CH1~CH0 is used to define which channel is selected.

When this register is written to, the wavetable synthe-

sizer will automatically output the dedicated PCM

code. So this register is also used as a start playing

key and it has to be written to after all the other

wavetable function registers are already defined.

· Change parameter selection

These two bits, VM and FR, are used to define which

There are two modes that can be selected to reduce

the process of setting the register. Please refer to the

statements of the following table:

Function

Update all the parameter

Only update the frequency number

Only update the volume

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