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PDF HT1130 Data sheet ( Hoja de datos )
| Número de pieza | HT1130 | |
| Descripción | 4-bit Microcontroller | |
| Fabricantes | Holtek Semiconductor | |
| Logotipo |  |
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HT1130
4-bit Microcontroller
Features
· Operating voltage: 2.4V~3.3V
· 12 input lines
· Four output lines
· Five working registers
· Sound effect circuit
· 4K ´ 8 program ROM
· 128 ´ 4 bits data memory RAM size
· 32 ´ 4 segment LCD driver
· RC oscillator for system clock
· Halt feature reduces power consumption
General Description
The HT1130 is a processor from Holtek s 4-bit
stand alone single chip microcontroller range
specifically designed for LCD product applica-
tions. The device is ideally suited for multiple
· Internal timer overflow interrupt
· External interrupt
· One level subroutine nesting
· 8-bit timer with internal or external clock
source
· 8-bit table read instruction
· Up to 4ms instruction cycle with 1MHz sys-
tem clock at VDD=3V
· All instructions in 1 or 2 machine cycles
LCD low power applications among which are
calculators, scales and hand-held LCD products.
1 May 24, 1999
1 page  
HT1130
Pad Description
Pad No. Pad Name I/O Mask Option
Function
1, 2 BZ, BZ
3 VLCD
4 T256
22 T1D
9 TEST1
10 TEST2
O Note 1 Sound effect outputs
I ¾ (+) LCD bias power supply
O For test mode only
O
I
¾ TEST1 and TEST2 are left open when the HT1130
is in normal operation (with an internal pull high
I resistor).
5~8
11~14
15~18
19
20
21
23~26
27~30
31
32
33
34~65
66
COM3~COM0 O
Note 2 Output for LCD panel common plate
PM3~PM0
I
Pull-high or 4-bit port for input only
None. Note 3
PS3~PS0
I
Pull-high or
None. Note 3
4-bit port for input only
VSS
I ¾ Negative power supply, GND
OSCI
OSCO
I
O
¾
OSCI,OSCO are connected to an external resistor
for an internal system clock
PA3~PA0
CMOS or
O NMOS Open 4-bit latch port for output only
drain
PP0~PP3
I
Pull-high or
None. Note 3
4-bit port for input only
INT
I
¾
External interrupt input with pull high resistor
Active on edge-triggered high to low transition
RES
I
¾
Input to reset an internal LSI
Reset is active on logical low level
TMCLK
I
Pull-high or
None. Note 4
Input for TIMER clock
TIMER can be clocked by an external clock or an
internal frequency source.
SEG0~SEG31 O
¾ LCD driver outputs for LCD panel segment
VDD
I ¾ Positive power supply
*Notes: 1. The system clock provides six different sources selectable by mask option to drive the
sound effect clock. If the Holtek sound library is used, only 128K and 64K are acceptable.
2. Either (1/4 duty;1/3 bias) or (1/3 duty:1/3 bias) should be specified by mask option.
3. Each bit of ports PM, PS and PP can be a trigger source of the HALT interrupt, selectable
by mask option.
4. 13 internal clock sources can be selectable by mask option to drive TMCLK. Note that
TMCLK should not be connected to a pull high resistor if an internal source is used.
5 May 24, 1999
5 Page 
Initial reset
The HT1130 provides an RES pin for system
initialization. This pin is equipped with an in-
ternal pull high resistor and in combination
with an external 0.1m~1mF capacitor, provides
an internal reset pulse of sufficient length to
guarantee a reset to all internal circuits. If the
reset pulse is generated externally, the RES pin
must be held low for at least 5ms. Normal cir-
cuit operation will not commence until the RES
pin returns high.
The reset performs the following functions:
· Sets the program counter PC to 000H
· Disables the interrupt mode
· Stops the timer
· Resets the timer and timer flag
· Clears the carry flag
· Sets the sound off and one sing mode
· Sets port A high or floating
Halt
This is a special feature of the HT1130 to inter-
rupt the chip s normal operation and reduce
power consumption. When a HALT is executed
the following happens ...
· The system clock will be stopped.
· The contents of the on-chip RAM and regis-
ters remain unchanged.
· All of the LCD segments and commons will
have the VLCD voltage so the LCD becomes
blank.
The halt status can be terminated by an exter-
nal interrupt or a hardware reset.
In the HALT mode any bit of ports PP, PS, PM
can be used as external interrupts set by mask
option to wake-up the system. This signal is ac-
tive on a low-going transition.
When the halt status is terminated by an exter-
nal interrupt, the following procedure takes
place ...
HT1130
Case 1: If the system is in an interrupt-disable
state before entering the halt state:
· The instruction HALT is executed and the
system enters a halt state
· A falling edge transition on INT, or on any of
the wake up pins on ports PP, PS or PM, will
awaken the system and return to the main
program instruction following the HALT com-
mand.
· An interrupt signal, whether caused by INT
or the ports PP,PS or PM, will be held until
the system receives an enable interrupt com-
mand at which point the held interrupt will
be serviced.
Case 2: If the system is in an interrupt enable
state:
· The instruction HALT is executed and the
system enters a halt state
· A falling edge transition on INT, or on any of
the wake up pins on ports PP, PS or PM, will
awaken the system and execute the external
interrupt subroutine
Sound effects
The HT1130 includes sound effect circuitry
which offers up to 16 sounds with 3 tones, boom
and noise effects. Holtek supports a sound li-
brary which has melodies, alarms, machine
guns etc..
Whenever the instruction "SOUND n" or
"SOUND A" is executed, the specified sound
will begin. Whenever "SOUND OFF" is exe-
cuted, it terminates the singing sound immedi-
ately.
There are two singing modes, SONE mode and
SLOOP mode activated by SOUND ONE and
SOUND LOOP. In SONE mode the specified
sound plays just once. In SLOOP mode the
specified sound keeps re-playing.
Since sounds 0~11 contain 32 notes and sounds
12~15 contain 64 notes the latter possesses
better sound than the former.
The frequency of the sound effect circuit can be
selected by mask option.
11 May 24, 1999
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet HT1130.PDF ] | |
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