KING BILLION ELECTRONICS CO., LTD
HE84761
HE80000 SERIES
1
V1.1
A. HE84761 Introduction
HE84761 is a member of 8-bit Micro-controller series developed by King Billion Electronics Ltd,
User can configure 32COM:3072 dot LCD driver + 16 Bit I/O Port...2304 dot LCD driver + 40 Bit
I/O PortLCD driveror 48COM:3840 dot LCD driver + 16 Bit I/O Port...2688 dot LCD driver +
40 Bit I/O Port
or 64COM:4096 dot LCD driver + 16 Bit I/O Port...2560 dot LCD driver + 40 Bit
I/O PortBuilt-in power regulator circuitmake the LCD display more stableThe built-in OP
comparator can be used with (light, voice, temperature, humility) sensor or battery low detection. A 7-bit
current type D/A converter and PWM device provide the complete speech output mechanism. The
256KB ROM and 4KB RAM can be used as the storage of large speech data, graphic, text etc. It can be
used for Dictionary, Data Bank, Medium Level Educational Toy, Low duration Voice Recording System
etc..
The instruction set are quite easy to learn and simple to use. There are only about thirty instructions
with four-type addressing modes are provided. Most of instructions take only 3 oscillator clocks (machine
cycles), which is the high efficiency and low power MCU.
B. HE84761 Features
Operation Voltage:
2.4V 3.6V
System Clock:
4MHz ~ 8MHz
Internal ROM:
256K Bytes
Internal RAM:
4K Bytes; Dedicated RAM VDD
Dual Clock System:
Normal(Fast) clock:
32.768K ~ 8MHz(No Internal Clock)
Slow
clock:
32.768KHz
Operation Mode:
DUALFASTSLOWIDLEand SLEEP mode
New RC type oscillatoraccuracy at 5%maximum frequency up to around 10 MHzPlease refer
to the detail frequency table on section F
Internal Power on Reset circuit
With WDT (WATCH DOG TIMER) to prevent deadlock condition.
16~40 bit Bi-directional I/O port.
Mask Option can select PUSH-PULL or OPEN DRAIN output
mode for each I/O pin.
The new built-in hardware auto scan keyboard(4*20)(shared with LCD SEG pin)not only reduce
the hardware cost, but also reduce the firmware effort
Built-in OP comparator
User can select any one of three LCD configurations --- 32COM*96SEG LCD48COM*80SEG
LCDor 64COM*64SEG LCDThe LCD scan signal are Type B(please refer to HE80000 user's
manual, section 4.3.9 LCD control register), It is built-in type-IV LCD driver. The highest LCD
voltage LVP must be lower than 8.5Volt
Provide LFR and LDL output signalwhich can be connected to KDS80as a LCD Segment
extension
One 7-bit current type D/A The new DAC output structurewhich do not need to use capacitor to
adjust the input current of 8050CProvide Mask Option to select different output current
3mA=>4, 1.5mA=>8, 0.75mA=>16, 0.375mA=>16to make sure there will be no signal
KING BILLION ELECTRONICS CO., LTD
HE84761
HE80000 SERIES
2
V1.1
saturation
PWM device(No Rate Selection, connect with VDD & PWMP) Dedicated GND pin for PWM
block
Two external interrupts and three internal timer interrupts
Two 16-bit timers and one Time-Base timer
Instruction set 32 instructions, 4 addressing modes. 12-bit DATA POINTER for RAM and 18-bit
TABLE POINTER for ROM
C. Application Circuit
This circuit is
only for bias 1/6.5, 1/7.0, 1/7.5 and 1/8.0
. KB suggests user use this circuit at most
conditions. The other two circuits are (1/5.0, 1/5.5, 1/6.0) and (1/8.5, 1/9.0, 1/9.5, 1/10.0). To make sure
your LCD glass has best display effect, please use ICE5.x (Type-III LCD Driver) to simulate the
equivalent effect of Type-IV LCD driver. The same bias and LV5 will get almost the same result of
display effect. Please adjust your bias and LV5 on ICE 5.x and make sure the display of LCD is OK. Then
the display effect of 84761 (Type-IV LCD driver) will be the same at the same bias and LV5.
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