I/O Port銆?/div>
銆侭uilt-in
power regulator circuit錛宮ake the LCD display more stable銆俆he 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.銆?The
512KB 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. HE84760 Features
2.4V 鈥?3.6V
4MHz ~ 8MHz
512K Bytes(256K Program ROM+256K Data ROM)
4K Bytes; Dedicated RAM VDD
Normal(Fast) clock:
32.768K ~ 8MHz(No Internal Clock)
Slow clock:
32.768KHz
Operation Mode:
DUAL銆丗AST銆丼LOW銆両DLE銆乤nd SLEEP mode銆?/div>
New RC type oscillator錛宎ccuracy at 鹵5%錛宮aximum frequency up to around 10 MHz銆侾lease refer
to the detail frequency table on section F銆?/div>
Internal Power on Reset circuit銆?/div>
With WDT (WATCH DOG TIMER) to prevent deadlock condition.銆?/div>
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)錛宯ot only reduce
the hardware cost, but also reduce the firmware effort銆?/div>
Built-in OP comparator銆?/div>
User can select any one of three LCD configurations --- 32COM*96SEG LCD錛?8COM*80SEG
LCD錛宱r 64COM*64SEG LCD銆俆he LCD scan signal are Type B(please refer to HE80000 user鈥檚
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銆?/div>
Provide LFR and LDL output signal錛寃hich can be connected to KDS80錛宎s a LCD Segment
extension銆?/div>
One 7-bit current type D/A
銆俆he
new DAC output structure錛寃hich do not need to use capacitor to
adjust the input current of 8050C銆侾rovide Mask Option to select different output current
3mA=>4鈩? 1.5mA=>8鈩? 0.75mA=>16鈩? 0.375mA=>16鈩︼紝to make sure there will be no signal
1
V1.1
Operation Voltage:
System Clock:
Internal ROM:
Internal RAM:
Dual Clock System:
1
2
3
4
5
6
7
