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ST2608B Datenblatt(PDF) 2 Page - Sitronix Technology Co., Ltd.

Teilenummer ST2608B
Bauteilbeschribung  8-bit Integrated Microcontroller
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Hersteller  SITRONIX [Sitronix Technology Co., Ltd.]
Direct Link  http://www.sitronix.com.tw
Logo SITRONIX - Sitronix Technology Co., Ltd.

ST2608B Datenblatt(HTML) 2 Page - Sitronix Technology Co., Ltd.

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GENERAL DESCRIPTION
The ST2608B is a 8-bit integrated microcontroller designed
with CMOS silicon gate technology. The true static CPU core,
power down modes and dual oscillators design makes the
ST2608B suitable for power saving and long battery life
designs. The ST2608B integrates various logic to support
functions on-chip which are needed by system designers.
The ST2608B features the capacity of memory access of
maximum 44M bytes and DMA function for fast memory
transfer. Six chip-select pins are equipped for direct connection
to external ROM, SRAM, Flash memory or other devices. The
maximum size for a single external memory device can be 16M
bytes.
The ST2608B has 56 I/Os grouped into 6 ports. They are
Port-A ~ Port-F and Port-L, where the Port-F is 8 open drain
output pins shared with LCD COMs. Each I/O pins can be
programmed to input or output individually. Port-C inputs have
both pull-up and pull-down options. The other input pins have
only pull-up options. In the case of output mode, Port-C outputs
have open-drain type and CMOS type options; while the other
ports are fixed at CMOS type. The Port-A and Port-B are
designed for keyboard scan function. The Port-A inputs are
further equipped with de-bounce and transition triggered
interrupt function. The Port-C/D/E/L are shared with other
system functions. All the properties of I/O pins are still
programmable when they are configured to be other special
functional signals. This enlarges the flexibility of the usage of
the functional signals.
The ability of driving large LCD panels, up to 240x160, and
hardware gray-level support rich the display information and
the diversity of contents as well. By the patented sharing
mechanism design of internal memory, the LCD display
function can be done without the need of external display RAM.
The variable LCD buffer design also makes it feasible to use
small internal display RAM as the buffer of large-sized display.
User may free major internal RAM for computing or temporary
access while keeping the display content. The clock of LCD
(LCDCK) is not only sourced from main-frequency (OSC), it
can also be sourced by OSCX (32KHz crystal) to make current
consumption to be minimum.
The ST2608B equips serial communication ports, one UART
and one SPI, to perform different communications, ex.: RS-232
and IrDA, with system components or other products such as
PC, Notebook, and popular PDA. Three clocking outputs can
produce synthesized PWM signals or high frequency carrier for
IR remote control. This helps products become more useful in
our daily life.
The built-in four-channel PSG are designed to generate key
tone, melody, voice, and speech. Two dedicated pins with large
driving capacity can drive a buzzer/speaker directly.
The ST2608B has a Low Voltage Detector (LVD) for power
management usage. The status of internal or external power
can be detected and reported to the management software.
Power bouncing during power-on is a major problem when
designing a reliable system. The ST2608B equips a Low
Voltage Reset function to keep the whole system in reset status
when power is low. After the power returns to normal level, the
system may recover its original states and keeps working
correctly.
With these integrated functions inside, the ST2608B single chip
microcontroller is a right solution for PDA, translator, databank
and other consumer products.
The block diagram of ST2608B is shown in the following figure.


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