tc9444f TOSHIBA Semiconductor CORPORATION, tc9444f Datasheet - Page 10

• Manufacturer Part Number: tc9444f
• Description: Single-chip Karaoke Ic Ii
• Manufacturer: TOSHIBA Semiconductor CORPORATION

3. Microcontroller Interface
BOOT
MUTE
KEYCON
VC
BKSA
BKSB
EMP
DECI
ATIME
RTIME
COMP
ATTA
ATTB
KEYCON2
EXTO
CRAM
MODE
Note 4: The functions of some commands vary according to the internal program.
Command
3.1
easy-to-use interface. This interface has two modes: I
be switched by a DC setting via a pin.
Consisting of commands and data, the microcontroller interface block is designed as a simple and
Also, some programs contain commands that need not be set.
Refer to the separate software datasheet.
one to three bytes of data.
to output a sound at reset (analog through mode).
values at a reset.
converter to output VREF). Accordingly, to completely mute the analog output during operation,
digitally mute the output using the MUTE command, then set RESET to “L”.
Commands
One-byte (8-bit) commands are used to perform a range of settings. Some commands are followed by
An initial reset sets the microcontroller interface block to master mode. Boot ROM data can be used
After power-on, reset at least once by setting the
The commands are described below. The values in the table marked by an asterisk are the initial
Setting RESET to “L” also mutes the DA converter output (op-amp feed-back causes the DA
CH
A
B
B
B
B
C
D
0
1
2
3
4
5
6
7
8
9
Table 3.1 List of Commands
0 to 3
0 to F
0 to F
0 to 3
0 to F
0 to 3
0 to 3
0 to 6
0 to F
0 to 3
0, 1
0, 1
CL
0
0
1
2
3
2-byte
2-byte
2-byte
2-byte
3-byte
1-byte
Data
¾
¾
¾
¾
¾
¾
¾
¾
¾
¾
¾
10
2
C bus mode and three-lead mode. I
Initializes coefficient RAM.
Turns soft mute and RAMCLR on/off.
Key control; amount of key shift
16-page bank vocal cancel/change, multi-sound source
4-page bank function reserve
2-page bank function reserve
De-emphasis
Delay RAM decimation rate
Level detection attack time
Level detection release time
Compressor function
Digital attenuator level A
Digital attenuator level B
Controls an independent key or sets vibrato.
Extended output port data
Writes coefficient RAM.
Sets IC operating mode.
RESET
pin to low level.
Setting Contents
2
C bus mode can
2002-01-11
TC9444F