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參數(shù)資料
| 型號： | KS88C4400 |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | 8-Bit CMOS Microcontroller(8位 CMOS 微控制器) |
| 中文描述： | 8位CMOS微控制器（8位的CMOS微控制器） |
| 文件頁數(shù)： | 10/14頁 |
| 文件大?。?/td> | 129K |
| 代理商： | KS88C4400 |
KS88C4400/4404 MICROCONTROLLER
DATA SHEET
8-10
UART
The KS88C4400/4404 has a full-duplex serial port
with four programmable operating modes: There is
one synchronous mode and three UART (Universal
Asynchronous Receiver/Transmitter) modes:
— Serial I/O with baud rate of CPU clock /6
— 8-bit UART mode; variable baud rate
— 9-bit UART mode; CPU clock /32 or /16
— 9-bit UART mode, variable baud rate
Serial port receive and transmit buffers are both
accessed through the shift register, SIO (E9H).
Writing to the shift register loads the transmit buffer;
reading the shift register accesses a physically
separate receive buffer. The serial port is receive-
buffered. The receive data buffer enables reception
of the next byte to start before the previously
received byte has been read from the receive
register. If, however, the first byte has not been read
by the time the next byte is completely received, the
first byte is overwritten.
In all four operating modes, data transmission starts
when any instruction uses the SIO register as its
destination address.
PULSE WIDTH MODULATION
The pulse width modulation (PWM) module has the
following components:
— 16-bit counter with 2-bit prescaler
— Two 8-bit comparators
— Two 8-bit PWM data registers (PWM0, PWM1)
— PWM control register (PWMCON)
— PWM counter overflow interrupt (IRQ1)
— Two PWM output pins (PWM0, PWM1)
An 8-bit capture unit is included in the PWM
module. The capture unit is controlled by PWMCON
register settings and has the following components:
— 8-bit capture register (PWMCAP)
— Capture input pin (P3.6 /CAP, pin 30)
— Capture input interrupt (IRQ1, vector BAH)
The two 8-bit PWM circuits function identically:
Each has its own 8-bit data register and 8-bit
comparator. Each circuit compares a unique data
register value to the lower 8-bit value of the 16-bit
PWM counter.
The PWM module includes an integrated 8-bit data
capture unit. The capture unit captures the upper 8-
bit value of the 16-bit counter when a signal edge
transition is detected at the CAP pin. The captured
value is then dumped into the PWMCAP register
where it can be read. In this way, it can be used to
measure the pulse width of the incoming signals.
A/D CONVERTER
The 8-bit A/D converter (ADC) module uses
successive approximation logic to convert single-
channel analog inputs to equivalent 8-bit digital
values. The analog input level must lie between the
AV
REF
and AV
SS
values.
To start an analog-to-digital conversion procedure,
you write the SCH bits in the A/D converter control
register ADCON to select one of the eight analog
input pins (ADCn, n = 0–7).
The KS88C4400/4404 performs 8-bit conversions
for one input channel at a time. You can dynamically
select different channels by manipulating the SCH
bit values (SCH0–SCH2) in the ADCON register.
The A/D conversion process requires 24 CPU clocks
to convert each bit. Therefore, 192 clocks are
required to complete a full 8-bit conversion. The
digital result is dumped into the output register
ADOUT and the ADC module enters an idle state.
Because the ADC does not generate an interrupt to
signal a completed conversion, you must first read
the content of ADOUT before another conversion
starts. Otherwise, the previous result is overwritten.
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相關(guān)代理商/技術(shù)參數(shù) |
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| KS88C4404 | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:new SAM8 family of 8-bit single-chip CMOS microcontrollers offers a fast and efficient CPU, a wide range of integrated peripherals, and various mask-p |
| KS88C4504 | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:new SAM87RC family of 8-bit single-chip CMOS microcontrollers offers a fast and efficient CPU, a wide range of integrated peripherals, and various mas |
| KS88C4616 | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:new SAM8 family of 8-bit single-chip CMOS microcontrollers offers a fast and efficient CPU, a wide range of integrated peripherals, and various mask-p |
| KS88C4632 | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:new SAM8 family of 8-bit single-chip CMOS microcontrollers offers a fast and efficient CPU, a wide range of integrated peripherals, and various mask-p |
| KS88C4708 | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:new SAM87RC family of 8-bit single-chip CMOS microcontrollers offers a fast and efficient CPU, a wide range of integrated peripherals, and various mas |
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