SM8521 datasheet(44/56 Pages) SHARP

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SM8521

- 44 -

Registers

SGC (Control register)

Bit 7

Bits 7 : Sound output enable

Bits 6 to 4 : Set ‘0’.

Bit 3 : D/A direct output enable

Bit 2 : SG2 output enable

Bit 1 : SG1 output enable

Bit 0 : SG0 output enable

SG0L, SG1L (Output level control register ;

0, 1/32, 2/32…31/32)

Bit 7

(x = 0, 1)

The value of output level control register decides

the digital attention rate.

SG0TL, SG1TL (Time constant register ; Low)

Bit 7

(x = 0, 1)

SG0TH, SG1TH (Time constant register ; High)

Bit 7

(x = 0, 1)

Bits 7 to 4 : Set ‘0’.

A period of one step is variable based on the value

of Time constant register (SG0TL, SG0TH, SG1TL

and SG1TH composed of 12 bits.)

SG0W0-15, SG1W0-15 (Waveform register 0-15)

Bit 7

(x = 0, 1)(y = 0 to 15)

Bits 7 to 4 : Waveform data Low order

Bits 3 to 0 : Waveform data High order

SG2L (Output level control register ; 0, 1/32,

2/32…31/32)

Bit 7

Bits 7 to 5 : Set ‘0’.

The value of output level control register decides

the digital attenuation rate.

SG2TL (Time constant register ; Low)

Bit 7

SG2TH (Time constant register ; High)

Bit 7

Bits 7 to 4 : Set ‘0’.

A period of one step is variable based on the value

of Time constant register (SG2TL and SG2TH

composed of 12 bits).

SGDA (D/A direct output register ; write only)

Bit 7

The value of SGDA register directly transfers

digital mixer.

NOTES :

• Time constant register must be written by "MOVW"

instruction.

• Each time constant register must not be filled with all "0"

or only the Low significant bit is "1".

SONDOUT

---

DIROUT SG2OUT SG1OUT SG0OUT

---

SG2L4 SG2L3 SG2L2 SG2L1 SG2L0

SG2TL7 SG2TL6 SG2TL5 SG2TL4 SG2TL3 SG2TL2 SG2TL1 SG2TL0

----

SG2TH3 SG2TH2 SG2TH1 SG2TH0

SGDA7 SGDA6 SGDA5 SGDA4 SGDA3 SGDA2 SGDA1 SGDA0

---

SGxL4 SGxL3 SGxL2 SGxL1 SGxL0

SGxTL7 SGxTL6 SGxTL5 SGxTL4 SGxTL3 SGxTL2 SGxTL1 SGxTL0

----

SGxTH3 SGxTH2 SGxTH1 SGxTH0

SGxWy7 SGxWy6 SGxWy5 SGxWy4 SGxWy3 SGxWy2 SGxWy1 SGxWy0

SM8521 Datasheet(PDF) 44 Page - Sharp Corporation

SM8521 Datasheet(HTML) 44 Page - Sharp Corporation

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