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PDF EM73963A Data sheet ( Hoja de datos )
| Número de pieza | EM73963A | |
| Descripción | 4-BIT MICRO-CONTROLLER FOR LCD PRODUCT | |
| Fabricantes | ELAN Microelectronics Corp | |
| Logotipo |  |
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EM73963A
4-BIT MICRO-CONTROLLER FOR LCD PRODUCT
GENERAL DESCRIPTION
EM73963A is an advanced single chip CMOS 4-bit micro-controller. It contains 16K-byte ROM, 372-nibble
RAM, 4-bit ALU, 13-level subroutine nesting, 22-stage time base, two 12-bit timer/counters for the kernel
function. EM73963A also equipped with 5 interrupt sources, 3 I/O ports (including 1 input port and 2 bidirection
ports), LCD display (40x8), built-in sound generator.
It's low power consumption and high speedfeature are further strengten with DUAL, SLOW, IDLE and STOP
operation mode for optimized power saving.
FEATURES
Operation voltage : 2.4V to 5.5V.
Clock source
: Dual clock system. Low-frequency oscillator is Crystal or RC oscillator (32KHz,
connect a external resistor) by mask option and high-frequency oscillator is RC
oscillator (connect a external resistor and a capacitor).
External clock and internal clock is available by mask option.
Oscillation frequency : 480K, 1M, 2M and 4M Hz are both available for high frequency clock by mask option.
Instruction set
: 107 powerful instructions.
Instruction cycle time : Up to 2 µs for 4 MHz (high speed clock).
244 µs for 32768 Hz (low speed clock).
ROM capacity
: 16K X 8 bits.
RAM capacity
: 372 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).
Bidirection port
: 2 ports (P4, P8). P4.0 and SOUND are available by mask option. IDLE/STOP release
function for P8(0..3) 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 . . . . . 2 input interrupt sources.
Internal . . . . . . 2 Timer overflow interrupts.
1 Time base interrupt.
LCD driver
: 40 X 8 dots, 1/8 duty, 1/5 bias.
Sound effect
: Tone generator, random generator and volume control.
Power saving function :SLOW, IDLE, STOP operation modes.
Package type
: Chip form 69 pins.
* This specification are subject to be changed without notice.
6.14.2001 1
1 page  
EM73963A
4-BIT MICRO-CONTROLLER FOR LCD PRODUCT
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 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 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
OUT #00H , P3 ; Set in bank 1
LDL #00h;
LDH #03h;
LDAX
; ACC ← 6h
STAMI ; RAM[30] ← 6h
LDAXI ; ACC ← 5h
STAM
; RAM[31] ← 5h
;
ORG 1777h
DATA 56h;
DATA RAM (372-nibble )
A total 372 - nibble data RAM is available from address 000 to 17Fh
Data RAM includes the zero page region, stacks and data area.
* This specification are subject to be changed without notice.
6.14.2001 5
5 Page 
EM73963A
4-BIT MICRO-CONTROLLER FOR LCD PRODUCT
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
ZF CF SF
ALU FUNCTION
(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 subtration 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", otherwise, ZF is "1".
EXAMPLE:
Operation
8-4=4
7-F= -8(1000)
9-9=0
Carry
1
0
1
Zero
0
0
1
* This specification are subject to be changed without notice.
6.14.2001 11
11 Page | ||
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| PDF Descargar | [ Datasheet EM73963A.PDF ] | |
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