Sound Generator Registers - Fujitsu MB90420/5 (A) Series Hardware Manual

MB90420/5 (A) SERIES F

20.2 Sound Generator Registers

The sound generator has the following types of registers:
• Sound control register (SGCR)
• Frequency data register (SGFR)
• Amplitude data register (SGAR)
• Decrement grade register (SGDR)
• Tone count register (SGTR)
n Sound Generator Registers
Sound control register (higher)
Address: 00005B
H
Read/write →
Initial value →
Sound control register (lower)
Address: 00005A
H
Read/write →
Initial value →
Amplitude data register
Address: 00005D
H
Read/write →
Initial value →
Frequency data register
Address: 00005C
H
Read/write →
Initial value →
Tone count register
Address: 00005F
H
Read/write →
Initial value →
Decrement grade register
Address: 00005E
H
Read/write →
Initial value →
2
MC-16LX FAMILY 16-BIT MICROCONTROLLERS HARDWARE MANUAL
15 14 13
TST — —
(R/W) — —
(0) — —
7 6 5
S1 S0 TONE
(R/W) (R/W) (R/W)
(0) (0) (0)
15 14 13
D7 D6 D5
(R/W) (R/W) (R/W)
(0) (0) (0)
7 6 5
D7 D6 D5
(R/W) (R/W) (R/W)
(X) (X) (X)
15 14 13
D7 D6 D5
(R/W) (R/W) (R/W)
(X) (X) (X)
7 6 5
D7 D6 D5
(R/W) (R/W) (R/W)
(X) (X) (X)
20-4
12 11 10
— — —
— — —
— — —
4 3 2
OE2 OE1 INTE
(R/W) (R/W) (R/W)
(0) (0) (0)
12 11 10
D4 D3 D2
(R/W) (R/W) (R/W)
(0) (0) (0)
4 3 2
D4 D3 D2
(R/W) (R/W) (R/W)
(X) (X) (X)
12 11 10
D4 D3 D2
(R/W) (R/W) (R/W)
(X) (X) (X)
4 3 2
D4 D3 D2
(R/W) (R/W) (R/W)
(X) (X) (X)
← Bit No.
9 8
BUSY DEC SGCRH
(R) (R/W)
(0) (0)
← Bit No.
1 0
INT ST SGCRL
(R/W) (R/W)
(0) (0)
← Bit No.
9 8
D1 D0 SGAR
(R/W) (R/W)
(0) (0)
← Bit No.
1 0
D1 D0 SGFR
(R/W) (R/W)
(X) (X)
← Bit No.
9 8
D1 D0 SGTR
(R/W) (R/W)
(X) (X)
← Bit No.
1 0
D1 D0 SGDR
(R/W) (R/W)
(X) (X)