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PDF APU428 Data sheet ( Hoja de datos )
| Número de pieza | APU428 | |
| Descripción | 4-Bit Micro-controller With LCD Driver | |
| Fabricantes | Apuls Intergrated Circuits | |
| Logotipo |  |
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APU428
4-Bit Micro-controller With LCD Driver
Features
y Low power dissipation
y Powerful instruction set (148 instructions)
Ϋʳ Binary addition, subtraction, BCD
adjustment, logical operation in direct
addressing mode and index
Ϋʳ addressing mode
Ϋʳ Single-bit manipulation (set, reset, decision
for branch)
Ϋʳ Various conditional branches
Ϋʳ 16 working registers and manipulation
Ϋʳ LCD driver data transfer
Ϋʳ Look-up table
Ϋʳ Programmable option
Ϋʳ System clock selection
y Memory capacity
Ϋʳ Instruction ROM capacity 2048 x 16 bits
Ϋʳ Index ROM capacity 256 x 8 bits
Ϋʳ Internal RAM capacity 256 x 4 bits
(low-address 128 nibbles can be accessed
by direct addressing, full-range 256 nibbles
can be accessed by index addressing)
y Input/output ports
Ϋʳ Port IOA 4 pins (with internal pull-low,
chattering clock, MUX with CX, RR, RT, RH/
SEG 37~40 by mask option)
Ϋʳ Port IOB 4 pins (MUX with ELC, ELP, BZB,
BZ/SEG41, 42 by mask option)
Ϋʳ Port IOC 4 pins (with internal pull-low,
low-level hold, chattering clock, MUX option
with AN1~4 by mask option)
Ϋʳ Port IOD 4 pins (MUX with PWM1,
2/SEG33~36 by mask option)
y 8-level subroutine nesting
y Interrupt function
Ϋʳ External factor 2 (INT pin & port IOA, IOC
input)
Ϋʳ Internal factor 4 (predivider, 2 timers & RFC)
y Built-in EL-light driver, alarm, frequency or
melody generator (MUX with IOB/ SEG41, 42)
y Built-in R to F converter circuit (MUX with
IOA/SEG37~40)
y Built-in comparator, 6/8-bit PWM output, 4-bit
D/A converter, low-battery detector; this
structure can be used as a 4/6/8-bit full range
ADC
Ϋʳ Port PWM 2 pins (MUX with SEG35, 36)
Ϋʳ Port ADC 4 pins (MUX with IOC)
y 2 6-bit programmable timers with programmable
clock source
y Watchdog timer
y LCD/LED driver output
Ϋʳ 42 LCD/LED driver outputs (up to 168 LCD
segments are drivable)
Ϋʳ Mask option is used to select static, 1/2 bias
1/2 duty, 1/2 bias 1/3 duty, 1/2 bias 1/4 duty,
1/3 bias 1/3 duty and 1/3 bias 1/4 duty drive
modes of the LCD panel
Ϋʳ Mask option is used to select DC output,
and static, 1/2 duty, 1/3 duty and 1/4 duty
drive modes of the LED panel
Ϋʳ Mask option is used to select SEG28~32 as
P open-drain DC outputs
Ϋʳ Single instruction stops all segments that
are either in LCD or LED
y Built-in voltage doubler, halver, tripler charge
pump circuit
y Dual clock operation
y HALT function
y Stop function
General Description
APU428 is an embedded high-performance 4-bit
microcomputer with an LCD/LED driver. It contains
all the necessary functions in a single chip: 4-bit
parallel processing ALU, ROM, RAM, I/O ports, timer,
clock generator, dual clock, ADC, RFC, alarm,
EL-light, LCD driver, look-up table and watchdog
timer. The instruction set consists of 148 instructions
which include nibble operation, manipulation,
various conditional branch instructions and LCD
data transfer instructions which are powerful and
easy to follow.
The HALT function stops any internal operations other
than the oscillator, divider and LCD driver in order to
minimize the power dissipation.
The stop function stops all clocks in the chip.
Preliminary
1
Ver. 0.0
1 page  
Pad Name
IOB1~4
IOC1~4
IOD1~4
RFC
RR
RT
RH
EL
ELP
CC
ELC
ALM
Z
GND
BZB
APU428
I/O Description
I/O Input/Output port B.
I/O IOB1, 2 shares pins with SEG41, 42, or ELC, ELP and is set by mask option.
IOB3, 4 shares pins with BZ, BZB and is set by mask option.
I/O Input/Output port C can use software to define the internal pull-low/
I/O
low-level hold resistor and chattering clock in order to reduce input bounce and
generate interrupt. This port shares pins with AN1-4 and is set by mask option.
Input / Output port D.
I/O This port shares pins with SEG33~36 and is set by mask option.
IOD3,4 shares pins with PWM1,2 and is set by mask option.
I 1 input pin and 3 output pins for RFC application.
O This port shares pins with SEG37~40 and is set by mask option.
O This port shares pins with IOA1~4 and is set by mask option.
O
O Output port for the EL-light.
O These ports share pins with SEG41, 42 and are set by mask option.
These ports share pins with IOB1, 2 and are set by mask option.
O Output port for alarm, frequency or melody generator.
O This port shares pins with IOB3,4 and is set by mask option.
Negative supply voltage.
Preliminary
5
Ver. 0.0
5 Page 
APU428
An example of ADC timing is shown below:
TCK4
IR
SW (LBR/AN4)
SW (AN4/DAC)
SAD 1Bh
LBR
DAC
SAD 28h
LBR
DAC
En LBR
SAD 11h
AN4
DAC
SAD 20h
AN4
DAC
En DAC
LHCP
T1h
ENCP
Note: Power Supply = 1.2V T1h needs 5ms
Power Supply = 2.4V T1h needs 10Ps
EL-light
Sets ELC and ELP clock and duty cycle using ELC X instruction, then turn on and off ELC and ELP output by
SF X and RF X instruction. With external transistor, diode, inductor and resistor, we can pump the EL panel to
AC 100~250V.
L1
D1
R1
ELP
Q1
ELC
R2
Q2
EL-plane
LIT
ELP
ELC
When the EL-light is turned on, the ELC will turn on before ELP, but when the EL-light is off, the ELP and ELC
will turn off after the next falling edge of ELC in order to make sure no voltage is left on the EL plane.
Timer
The 6-bit programmable timer can select PH3/PH9/PH15/FREQ (Timer 2 can also select PH5/PH7/PH11/
PH13 by TM2X instruction) as the clock source. When it underflows, HALT release signals are generated.
Preliminary
11
Ver. 0.0
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet APU428.PDF ] | |
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