SNC82030 Datasheet, PDF (6/13 Pages) SONiX Technology Company – 12-Channel MIDI/Speech Controller

SNC82030
12-Channel MIDI/Speech Controller
5.2. ROM
SNC82030 contains a substantial 96K x 12-bit word internal ROM which is shared by
program and resource data. Program, voice, melodies, data, and instrument
waveforms are shared within this same 96K words ROM.
5.3. RAM
SNC82030 contains 384 bytes RAM (384 x 8-bits). The 384 byte RAM is divided into
three pages (page0, 1 and 4, 128 bytes RAM for each page). The RAMBK register is
used to switch to a specific RAM page. For example, declaring
Org
0x250
UseMem ds 1
would locate one byte memory for “UseMem” at BANK 4. Setting ‘RAMbk = 4’in a
program would switch to bank 4 of RAM.
0x0000
:
:
0x007F
0x0080
:
0x00C0
0x00FF
0x0_:100
:
0x017F
0x0180
:
:
0x01FF
0x0200
:
:
0x027F
Reserved for System
Free for User
No Used
No Used
Free for User
Notice: (C0~FFh) and (200~27Fh) Bank4 is free for user.
5.4. Power Down Mode
Entering the IC into Stop Mode will stop the system clock for power savings (<3uA
@VDD=3V and <6uA @VDD=4.5V). Any transition (LH or HL) on any I/O pin or
RTC (Real-time clock) can be used to start the system clock and return to normal
operating mode.
5.5. IR Function
When IR is enabled, a 38.5KHz square wave is gated with P27. The 38.5KHz IR
signal is present at the pin when P27 is set to “1”.
Ver: 1.5
6
Sep. 8, 2006