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PDF EM73A83 Data sheet ( Hoja de datos )

Número de pieza EM73A83
Descripción 4-BIT MICRO-CONTROLLER FOR LCD PRODUCT
Fabricantes ELAN Microelectronics Corp 
Logotipo ELAN Microelectronics Corp Logotipo



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No Preview Available ! EM73A83 Hoja de datos, Descripción, Manual

GENERAL DESCRIPTION
EM73A83
4-BIT MICRO-CONTROLLER FOR LCD PRODUCT
Preliminary
EM73A83 is an advanced single chip CMOS 4-bit micro-controller. It contains 16K-byte ROM, 500-nibble
RAM, 4-bit ALU, 13-level subroutine nesting, 22-stage time base, two 12-bit timer/counters for the kernel
function. EM73A83 also equipped with 6 interrupt sources, 3 I/O ports (including 1 input port and 2 bidirection
ports), LCD display (40x16), built-in sound generator and speech synthesizer.
It's low power consumption and high speed feature are further strengten with DUAL, SLOW, IDLE and STOP
operation mode for optimized power saving.
FEATURES
• Operation voltage
: 2.2V to 4.8V.
• Clock source
: Dual clock system. Low-frequency oscillator is 32 KHz Crystal oscillator or RC
oscillator by mask option and high-frequency oscillator is a built-in internal
oscillator (4.6 MHz).
• Instruction set
: 107 powerful instructions.
• Instruction cycle time : 1.7µs for 4.6M Hz (high speed clock).
244µs for 32768 Hz (low speed clock).
• ROM capacity
: 16K x 8 bits.
• RAM capacity
: 500 x 4 bits.
• Input port
: 1 port (P0.0-P0.3), IDLE/STOP releasing function is available by mask option.
(each input pin has a pull-up and pull-down resistor available by mask option).
• Bidrection port
: 2 ports (P4, P8). IDLE/STOP release function for P8(0..3) is available by mask
option.
• Built-in watch-dog-timer counter : It is available by mask option.
• 12-bit timer/counter : Two 12-bit timer/counters are programmable for timer, event counter and pulse
width measurement mode.
• Built-in time base counter : 22 stages.
• Subroutine nesting
: Up to 13 levels.
• Interrupt
: External interrupt . . . . . . 2 input interrupt sources.
Internal interrupt . . . . . . 2 timer overflow interrupts, 1 time base interrupt.
1 speech interrupt.
• LCD driver
: 40x16 dots, 1/16 duty, 1/5 bias with voltage multiplier.
• Sound effect
: Tone generator and random generator.
• Speech synthesizer
: 160K speech data ROM (use as 160K nibbles data ROM).
• Power saving function : SLOW, IDLE, STOP operation modes.
• Package type
: Chip form 85 pins.
* This specification are subject to be changed without notice.
10.31.2000 1

1 page




EM73A83 pdf
EM73A83
4-BIT MICRO-CONTROLLER FOR LCD PRODUCT
Preliminary
B XA2
:
;--------------- -------------------- -------------------- -------------------- --
BANK 2
XB1 :
:
:
B XB
:
XB2 :
:
B XB2
:
;--------------- -------------------- -------------------- -------------------- --
BANK 3
XC1 :
:
:
B XC
:
XC2 :
:
B XC2
Fixed data can be read out by table-look-up instruction. Table-look-up instruction is requires the Data point
(DP) to indicate the ROM address in obtaining the ROM code data (Except bank 0) :
LDAX
LDAXI
Acc ROM[DP]L
Acc ROM[DP]H,DP+1
DP is a 12-bit data register that stores the program ROM address as pointer for the ROM code data.
User has to initially load ROM address into DP with instructions "STADPL", and "STADPM, STADPH",
then then to obtain the lower nibble of ROM code data by instruction "LDAX" and higher nibble by instruction
"LDAXI"
PROGRAM EXAMPLE: Read out the ROM code of address 1777h by table-look-up instruction.
LDIA #07h;
STADPL
STADPM
STADPH
:
; [DP]L 07h
; [DP]M 07h
;
[DP]
H
07h,
Load
DP=777h
LDL #00h;
LDH #03h;
LDAX
; ACC 6h
STAMI ; RAM[30] 6h
LDAXI ; ACC 5h
STAM
; RAM[31] 5h
;
ORG 1777h
DATA 56h;
DATA RAM ( 500-nibble )
A total 500 - nibble data RAM is available from address 000 to 1FFh
Data RAM includes the zero page region, stacks and data areas.
* This specification are subject to be changed without notice.
10.31.2000 5

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EM73A83 arduino
EM73A83
4-BIT MICRO-CONTROLLER FOR LCD PRODUCT
PROGRAM EXAMPLE:
Preliminary
Check following arithematic operation for CF, ZF, SF
CF ZF
LDIA #00h;
LDIA #03h;
ADDA #05h;
ADDA #0Dh;
ADDA #0Eh;
-1
-0
-0
-0
-0
SF
1
1
1
0
0
ALU
The arithematic operation of 4 - bit data is performed in ALU unit . There are 2 flags that can be affected by
the result of ALU operation, ZF and SF. The operation of ALU is affected by CF only.
ALU STRUCTURE
ALU supported user arithematic operation functions, including Addition, Subtraction and Rotaion.
DATA BUS
ALU
ALU FUNCTION
ZF CF SF
(1) Addition:
ALU supports addition function with instructions ADDAM, ADCAM, ADDM #k, ADD #k,y .... .
The addition operation affects CF and ZF. Under addition operation, if the result is "0", ZF will be "1",
otherwise, ZF will be "0", When the addition operation has a carry-out. CF will be "1", otherwise, CF will
be "0".
EXAMPLE:
Operation
3+4=7
7+F=6
0+0=0
8+8=0
Carry
0
1
0
1
Zero
0
0
1
1
(2) Subtraction:
ALU supports subtraction function with instructions SUBM #k, SUBA #k, SBCAM, DECM... . The
subtraction operation affects CF and ZF. Under subtraction operation, if the result is negative, CF will
be "0", and a borrow out, otherwise, if the result is positive, CF will be "1". For ZF, if the result of subtraction
operation is "0", the ZF is "1", likewise, ZF is "1".
* This specification are subject to be changed without notice.
10.31.2000 11

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