參數(shù)資料
型號： S1C88816D
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 8.2 MHz, MICROCONTROLLER, UUC164
封裝： DIE-164
文件頁數(shù)： 123/173頁
文件大?。?/td> 1411K
代理商： S1C88816D
S1C88816 TECHNICAL MANUAL
EPSON
45
5 PERIPHERAL CIRCUITS AND THEIR OPERATIO (I/O Ports)
5.6 I/O Ports (P ports)
5.6.1 Configuration of I/O ports
The S1C88816 is equipped with 16 bits of I/O ports
(P00–P07 and P10–P17).
Figure 5.6.1.1 shows the structure of an I/O port.
Fig. 5.6.1.1 Structure of I/O port
I/O ports can be set for input or output mode in
one bit unit. These settings are performed by
writing data to the I/O control registers.
The I/O port terminals P10–P13 are shared with the
serial interface input/output terminals and P14–
P17 are shared with the A/D converter input
terminals. The function of the terminals is
switchable by software. For details of the serial
interface and A/D converter, see "5.7 Serial
Interface" and "5.15 A/D Converter", respectively.
The data registers and I/O control registers of the
I/O ports set as serial interface outputs are usable
as general purpose registers with read/write
capabilities which do not affect I/O activities of the
terminal.
The same as above, I/O control registers of the I/O
ports set as serial interface or A/D converter inputs
are usable as general purpose register.
Input
control
VDD
VSS
Data
bus
Pxx
Data
register
I/O control
register
Mask
option
*1
*2
*1: During output mode
*2: During input mode
5.6.2 Mask option
I/O port pull-up resistors
P00 ............ s
s With resistor
s
s Gate direct
P01 ............ s
s With resistor
s
s Gate direct
P02 ............ s
s With resistor
s
s Gate direct
P03 ............ s
s With resistor
s
s Gate direct
P04 ............ s
s With resistor
s
s Gate direct
P05 ............ s
s With resistor
s
s Gate direct
P06 ............ s
s With resistor
s
s Gate direct
P07 ............ s
s With resistor
s
s Gate direct
P10 ............ s
s With resistor
s
s Gate direct
P11 ............ s
s With resistor
s
s Gate direct
P12 ............ s
s With resistor
s
s Gate direct
P13 ............ s
s With resistor
s
s Gate direct
P14 ............ s
s With resistor
s
s Gate direct
P15 ............ s
s With resistor
s
s Gate direct
P16 ............ s
s With resistor
s
s Gate direct
P17 ............ s
s With resistor
s
s Gate direct
I/O ports P00–P07 and P10–P17 are equipped with
a pull-up resistor which goes ON in the input
mode. Whether this resistor is used or not can be
selected for each port (one bit unit).
In cases where the 'With resistor' option is selected,
the pull-up resistor goes ON when the port is in
input mode.
When changing the port terminal from LOW level
to HIGH with the built-in pull-up resistor, a delay
in the waveform rise time will occur depending on
the time constant of the pull-up resistor and the
load capacitance of the terminal. It is necessary to
set an appropriate wait time for introduction of an
I/O port. Make this wait time the amount of time
or more calculated by the following expression.
Wait time = RIN x (CIN + load capacitance on the
board) x 1.6 [sec]
RIN: Pull up resistance Max. value
CIN: Terminal capacitance Max. value
When the A/D converter is used, select "Gate
direct" for I/O ports (P14–P17) which then become
input terminals.
For unused I/O ports, select the default setting of
"With resistor".
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相關代理商/技術參數(shù)
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S1C8F360F513200 功能描述:16位微控制器 - MCU 8-bit Flash 60KB LCD Dr. 51 x 32 RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數(shù)據(jù)總線寬度:16 bit 最大時鐘頻率:24 MHz 程序存儲器大小:8 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風格:SMD/SMT
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