SN66030B
4-Channel Speech Controller
5
FUNCTION DESCRIPTIONS
5.1. Oscillator
SN66030B accepts crystal oscillator / ceramic resonator or RC type oscillator
(selected by pin CKSEL) for system clock. The typical circuit diagrams for oscillator
are listed as follows.
VDD
VDD
20pf
CKSEL
OSC/XIN
XOUT
CKSEL
OSC/XIN
XOUT
20pf
2MHz
Crystal / Resonator
RC Oscillator
5.2. ROM
SN66030B contains 96K word (12-bit) internal ROM. Program, voices, melodies, data,
and instrument waveforms share the same ROM with the others.
5.3. RAM
SN66030B contains 128 nibble RAM. The 128 nibble RAM is separated into two
pages (page 0 and page 1). An implicit page indicator is utilized to specify page
address. Two instructions, PAGE0 and PAGE1, can switch the page indicator. All 64
nibbles of each page can be accessed by direct mode (to specify M0 ~ M63 in the data
transfer type instructions.)
5.4. Power Down Mode
“End” instruction will let SN66030B enter power down mode and consumer very little
amount of current. (<2uA @VDD=3V and <5uA @VDD=5V) After SN66030B enters
power down mode, any valid data transition (L H or H L) occurring on any input
ports or IO ports (P1, P2, and P3) lead SN66030B back to normal operation mode.
Ver: 1.1
3
December 6, 2004
SONIX [ SONIX TECHNOLOGY COMPANY ]
