8. Sep, 1998
ML63326
PRELIMINARY
ML63326
4-Bit Microcontroller with built-in Voice Synthesis and 1024-Dot LCD Drivers
GENERAL DESCRIPTION
The ML63326 is a low power 4-bit microcontroller which incorporates the OKI original CPU core nX-4/250 and
provides a minimum instruction execution time of 1
s (@2MHz).
It contains 24K-word program memory, 1536-nibble data memory, 4-bit input port, four 4-bit output ports,
five 4-bit and 2-bit input-output ports, shift register, LCD driver for up to 1024 segments, and voice synthesis,
including 1 megabit mask ROM for speech data, a 12-bit D/A converter and low-pass filter internally. Speech
ROM size can be expanded externally with further 4 megabits. The ML63326 is suitable for applications such
as games, toys, clocks etc. which use an LCD display and voice synthesis.
FEATURES
Rich instruction set
439 instructions
Transfer, rotate, increment, decrement, arithmetic operations, comparison, logic operations, mask
operations, bit operations, ROM table reference, external memory transfer, stack operations, flag
operations, branch, conditional branch, call/return, control.
Rich selection of addressing modes
Indirect addressing of four data memory types, with current bank register, extra bank register, HL register
and XY register.
Data memory bank internal direct addressing mode.
Processing speed
Two clocks per machine cycle, with most instructions executed in one machine cycle.
Minimum instruction execution time : 61
s ( @32.768kHz system clock )
1
s ( @2MHz system clock: 1/2 of high-speed clock )
Clock generation circuit
Low-speed clock: : 32.768kHz crystal oscillator,
or 32kHz
40
%
(@1M
10
%
), RC oscillator (by mask option)
High-speed clock: : 4MHz (max.) crystal oscillator,
or 2MHz
40
%
(@20k
5
%
) RC oscillator (by software selection)
Program memory space
24K words
Basic instruction length is 16 bits / 1 word
Data memory space
1536 nibbles
External data memory space
64kbyte ( expandable )
Stack level
Call stack level : 16 levels
Register stack level : 16 levels
8.Sep,1998
ML63326
PRELIMINARY
2 of 4
I/O ports
Input ports: Selectable as input with pull-up resistance/ input with pull-down resistor / high-impedance input
Output ports: Selectable as P-channel open drain output / N-channel open drain output / CMOS output /
high-impedance output
Input-output ports: Selectable as input with pull-up resistance / input with pull-down resistance / high-
impedance input
Selectable as P-channel open drain output / N-channel open drain output / CMOS
output / high-impedance output
Can be interfaced with external peripherals that use a different power supply than this device uses.
Number of ports:
Input ports : 1 port
4 bits
Output port
: 4 ports
4 its
Input-output port
: 5 ports
4 bits and 1 port
2 bits
Voice synthesis
Algorithm : 4-bit ADPCM / Oki non-linear 8-bit PCM / 8-bit PCM
Voice synthesis data memory:
Internal ROM : 1 Mbit mask ROM (128k bytes)
External ROM
: 4 Mbit ROM (512k bytes max.)
Sampling frequencies (at clock frequency 4.096MHz)
4.0kHz, 5.3kHz, 6.4kHz, 8.0kHz, 10.7kHz, 12.8kHz, 16.0kHz
12-bit D/A converter
Low-pass filter
Melody output function
Two systems (one is in voice synthesis portion, the other is in microcontoroller portion)
MD, MDB output ports are selected from two systems
Melody output in voice synthesis portion can put out to AOUT/AOUTB output ports
LCD driver
Number of segments : 1024 Max. (64SEG
16COM)
1/1 to 1/16 duty
1/4 or 1/5 bias (regulator built-in)
Selectable as all-on mode/ all-off mode/ power down mode/ normal display mode
Adjustable contrast
Reset function
Reset through RESET pin
Power-on reset
Reset to low-speed oscillation halt
Battery check
Low-voltage supply check
Criterion voltage : Can be selected as 2.40
0.20V
Timers and Counters
8-bit timer
4
Selectable to auto-reload mode/ capture mode/ clock frequency measurement mode
Watchdog timer
1
100Hz timer
1
15-bit time-base counter
1
1, 2, 4, 8, 16, 32, 64, and 128Hz signals can be read
8.Sep,1998
ML63326
PRELIMINARY
3 of 4
Shift register
Shift clock : 1
or 1/2
system clock, external clock
Data length : 8 bits
Interrupt sources
External interrupt : 3
Internal interrupt : 12 (watchdog timer
1, time base
4, 100Hz timer
1, timer
4,
shift-register
x 1, melody
1), (watchdog timer interrupt is a
nonmaskable interrupt )
Operating voltage
+2.0 to 5.5V
Package
Chip : ( Product name : ML63326 - xxx )
xxx indicates a code number.
Chip size : TBA
Chip thickness : 350
m (typ.)
Fig.1 shows PAD layout image.
Minimum pad pitch : xxx
m (a)
Bonding pad size : 100
m
100
m (b
c)
Pad size : 110
m
110
m (d
e)
Fig.1 PAD layout
a
b
c
d
e
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