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Input/Output Ports
8 Channel Wavetable Synthesizer
Memory Map Register Table (1DH~FFH)
Name
1DH
Function
D7
D6
D5
D4
D3
D2
D1
D0
DAC high byte (no default value)
DAC low byte (no default value)
DA15 DA14 DA13 DA12 DA11 DA10 DA9
DA8
DA0
1EH
DA7
DA6
DA5
DA4
DA3
DA2
DA1
DAON
CH1
DAON=1: DAC ON
DAON=0: DAC OFF (default)
SELW=1: DAC data from wavetable
SELW=0: DAC data from MCU
SELW
-
SELW
-
Right
1FH
¾
¾
¾
¾
¾
Left
20H
21H
22H
23H
24H
Channel number selection
High byte frequency number
Low byte frequency number
High byte start address
VM
BL3
FR7
FR
BL2
FR6
CH2
CH0
FR8
FR0
ST8
ST0
BL1
FR5
BL0
FR4
FR11 FR10 FR9
FR3
ST11 ST10
ST3 ST2
FR2
FR1
ST9
ST1
Low byte start address
ST7
ST6
ST5
ST4
Wave bit select,
25H
26H
27H
WBS RE14 RE13 RE12 RE11 RE10 RE9
RE8
RE0
VR8
High byte repeat number
Low byte repeat number
RE7
A_R
RE6
RE5
VL9
RE4
RE3
RE2
RE1
Envelope control,
Volume control
VL8 ENV1 ENV0 VR9
28H
Unused
VL6
29H
Volume control
Volume control
VL7
VR7
VL5
VR5
VL4
VR4
VL3
VR3
VL2
VR2
VL1
VR1
LV0
VR0
2AH
VR6
2BH~2FH
Unused
30H~FFH Data memory (RAM)
General purpose data memory (same as 8-Bit MCU)
Note:
²¾² No function, read only, read as ²0².
²Unused² No function, read only, read as ²0².
Rev. 1.00
15
August 15, 2005
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
