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PDF HT827A0 Data sheet ( Hoja de datos )
| Número de pieza | HT827A0 | |
| Descripción | 8-Bit Microcontroller with Voice ROM | |
| Fabricantes | Holtek Semiconductor Inc | |
| Logotipo |  |
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HT827A0
8-Bit Microcontroller with Voice ROM
Features
8-bit microcontroller
· Operating voltage: 2.4V~5.2V
· 8K´16 program ROM
· 208´8 data RAM
· 36 bidirectional I/O lines
· Interrupt input
· 16-bit programmable timer/event
counter with overflow interrupts
· Watchdog timer
· On-chip crystal or RC types of oscillator
Voice and melody synthesizer
· 128K´8 voice ROM
· 3/4 bit ADPCM coding algorithm
· 26 kinds of voice sampling rates
· Tone level of 4 octaves
· 14 kinds of melody beats
Applications
· Intelligent educational toys
· High end toy controllers
· Talking alarm clocks
General Description
The HT827A0 is 8-bit high performance
microcontroller with a voice synthesizer and
tone generator. They are designed for applica-
tions on multiple I/Os with sound effects. The
LSIs provide 26 kinds of voice sampling rates, 4
octaves of tone level as well as a high quality of
· Halt function and wake-up feature reduces
power consumption
· 63 powerful instructions
· Up to a 1ms instruction cycle with a 4MHz
system clock at VDD=5V
· All instructions in 1 or 2 machine cycles
· 16-bit table read instruction
· 8-level subroutine nesting
· Bit manipulation instruction
· Current type of D/A switch output
· Tone generator counter
· Controllable volume
· 48-pin DIP package
· Alert and warning systems
· Public address systems
· Sound effect generators
current type D/A output. With such a flexible
structure, the HT827A0 is excellent for versa-
tile voice and sound effect product applications.
It also includes a halt function to reduce power
consumption.
1 March 15, 2000
1 page  
HT827A0
Pad No. Pad Name I/O
Mask
Option
Description
13~20
PD0~PD7
Bidirectional 8-bit input/output ports
I/O
Pull-high
or None
Software instructions determine the CMOS output or
schmitt trigger input with or without a pull-high resistor
(mask option).
6 VSS
¾ ¾ Negative power supply, ground
7~10
PE0~PE3
Bidirectional 8-bit input/output ports
I/O
Pull-high
or None
Software instructions determine the CMOS output or
schmitt trigger input with or without a pull-high resistor
(mask option).
11 INT
External interrupt schmitt trigger input with a
I ¾ pull-high resistor
Edge triggered is activated on a high to low transition.
12 TMR
I ¾ Schmitt trigger input for a timer/event counter
29 AUD
O
¾
Audio output for driving an external transistor
PMOS open drain output
30 RES
I ¾ Schmitt trigger reset input, active low
31 VDD
¾ ¾ Positive power supply
32 OSC1
33 OSC2
OSC1 and OSC2 connect to an RC network or crystal os-
I
O
Crystal or
RC
cillator (determined by mask option) for an internal sys-
tem clock. In the case of RC operation, an oscillation
resistor connects to OSC1. OSC2 is the output terminal
of a 1/4 system clock.
Absolute Maximum Ratings
Supply Voltage..............................-0.3V to 5.5V
Input Voltage .................VSS-0.3V to VDD+0.3V
Storage Temperature.................-50°C to 125°C
Operating Temperature ..............-25°C to 70°C
Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maxi-
mum Ratings² may cause substantial damage to the device. Functional operation of this de-
vice at other conditions beyond those listed in the specification is not implied and prolonged
exposure to extreme conditions may affect device reliability.
5 March 15, 2000
5 Page 
0 0 H In d ir e c t A d d r e s s in g R e g is te r
01H M P
02H
03H
04H
05H A C C
06H P C L
07H TB LP
08H TB LH
09H W D TS
0A H S TA TU S
0 B H IN T C
0C H
0D H
0E H
0FH TM R H
10H TM R L
11H TM R C
12H P A
13H P A C
14H P B
15H P B C
16H P C
17H P C C
18H P D
19H P D C
1A H P E
1B H P E C
1C H
1D H
1E H
1FH
20H D A L
21H D A H
22H V C R
23H S R C
24H
25H
26H
27H
28H B E A T
29H TE M P O
2A H TO N E
2B H
2C H R O M C
2D H
2E H
2FH
30H
G e n e ra l P u rp o s e
D ATA M EM O R Y
S p e c ia l P u r p o s e
D ATA M EM O R Y
:U nused
R e a d a s "0 0 "
FFH
RAM mapping
HT827A0
control registers (PAC; 13H, PBC; 15H, PCC;
17H, PDC; 19H, PEC; 1BH). The 20H to 2FH
are used for sound and tone (melody) synthesis.
The function registers include a lower-order
byte register (DAL; 20H) of D/A data,
higher-order byte register (DAH;21H) of D/A
data , volume control register (VCR; 22H), sam-
pling rate control register (SRC; 23H), beat con-
trol register (BEAT; 28H), tempo control
register (TEMPO; 29H), tone control register
(TONE; 2AH) and voice ROM control register
(ROMC; 2CH). The remaining space before 30H
is reserved for future expansion. Reading these
remaining locations will get ²00H². The general
purpose data memory is used for data and con-
trol information under instruction commands.
All of the areas of data memory can handle
arithmetic, logic, increment, decrement and ro-
tate operations directly. Except for some dedi-
cated bits, each bit in the data memory can be
set and reset by ²SET [m].i² and ²CLR [m].i²,
and can also be indirectly accessed through a
memory pointer register (MP; 01H).
Indirect addressing register
Location 00H is an indirect addressing register
that is not physically implemented. Any
read/write operation of [00H] accesses the data
memory pointed to by MP (01H). Indirectly read-
ing location 00H will return the result to 00H
whereas, indirectly writing it will have no effect.
Arithmetic and logic unit - ALU
This circuit performs 8-bit arithmetic and logic
operations. ALU provides the following func-
tions:
· Arithmetic operations (ADD, ADC, SUB,
SBC, DAA)
· Logic operations (AND, OR, XOR, CPL)
· Rotation (RL, RR, RLC, RRC)
· Increment & decrement (INC, DEC)
· Branch decision (SZ, SNZ, SIZ, SDZ ....)
ALU not only saves the results of a data opera-
tion but also change the status register.
11 March 15, 2000
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet HT827A0.PDF ] | |
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