SNC88040 Datasheet, PDF (6/14 Pages) SONiX Technology Company – 24-Channel MIDI/Speech Controller

SNC88040
24-Channel MIDI/Speech Controller
5.2. ROM
SNC88040 contains a substantial 128K 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 128K words ROM.
5.3. RAM
SNC88040 contains 640 bytes RAM (640 x 8-bits). The 640 byte RAM is divided into
five pages (page0, 1, 2, 3 and 4, 128 bytes RAM for each page). The RAMBK register
is used to switch to a specific RAM page. For example, declaring
Org
0x180
UseMem ds 1
would locate one byte memory for “UseMem” at BANK 3. Setting ‘RAMbk = 3’in a
program would switch to bank 3 of RAM.
0x0000
:
:
0x007F
0x0080
:
:
0x00FF
0x0100
:
:
0x017F
0x0180
:
:
0x01FF
0x0200
:
:
0x027F
Reserved for System
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.
Ver: 1.5
6
Sep 08, 2006