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SC73C1402D PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 SC73C1402D
기능 4BIT MCU FOR REMOTE CONTROLLER
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SC73C1402D 데이터시트, 핀배열, 회로
SC73C1402
4-BIT MCU FOR REMOTE CONTROLLER(MASK TYPE)
DESCRIPTION
SC73C1402 is one of Silan’s 4-bit CMOS single-chip micro-
controllers for infrared remote control transmitters (IRCTs). It can
be implemented in various IRCT circuits by mask option.
SOP-20-300-1.27
FEATURES
* Operating voltage range: (2.0 ~ 4.0V)
Low static power consumption (<1uA)
SOP-20-375-1.27
* Program memory: 2Kx 9 bits
The last 1K areas can also be used as data table
* Data memory (RAM): 16 x 4 bits
* Timer/counter: 10~15 bits
SSOP-20-300-0.65
* 20 I/O ports, where there is a 4-bit input, two 4-bit outputs and
two 4-bit programmable input/output ports(P53 is output but ORDERING INFORMATION
not used as keypress).
* Oscillator frequency (fosc):
Device
Package
300KHz~2MHz or 2MHz~6MHz selectable by mask option
SC73C1402
SOP-24-375-1.27
* Operating frequency (fmain):
SC73C1402A SOP-20-300-1.27
fmain=fosc (when fosc in the range of 300KHz~2MHz)
SC73C1402B SSOP-20-300-0.65
fmain=fosc/8 (when fosc in the range of 2MHz~6MHz)
* Carrier frequency: fmain/12
* Carrier duty: 1/2 or 1/3 duty selectable by program
* Instruction cycle: 5/fmain
SC73C1402C
SC73C1402D
SC73C1402E
SOP-20-375-1.27
DIE
SSOP-24-300-0.65
* Handles various user’s codes, repeat key, persist-key press APPLICATIONS
www.DataSheet4Ua.ncdommany other functions
* Power on reset
* Supports voltage-drop detection
* Supports 56 keys in 20-pin package, and 80 keys in 24-pin
package.
* Infrared remote control devices, such
as TV, Video Cassette Recorder, VTR,
laser phonograph and acoustics
remote controllers.
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.1 2005.12.19
Page 1 of 20




SC73C1402D pdf, 반도체, 판매, 대치품
SOP-20/SSOP-20 project 3
P22 1
P23 2
P51 3
P52 4
P53 5
VDD 6
XT1 7
XT2 8
GND 9
RSTN 10
20 P21
19 P20
18 P13
17 P12
16 P11
15 P10
14 P03
13 P02
12 P01
11 P00
SC73C1402
PIN DESCRIPTION
Symbol
VDD
GND
RSTN
P50
XT1
XT2
P00~P03
www.DataSheet4UP.c1o0m~P13
P20~P23
P30~P33
P52
P53
P51
Description
Power supply (2.0V~4.0V)
Reset active low
P-channel open-drain output
Crystal oscillator output
Crystal oscillator input
4-bit input pin (with internal pull-down resistor). This pin is used for keyboard scan and to
control internal circuit.
4-bit I/O port (It can be set to input or output by program, with internal pull-down resistor).
In input mode, it can be used for keyboard scan.
In output mode, used for keyboard scan output.
4-bit I/O port (It can be set to input or output by program, with internal pull-down resistor).
In input mode, it can be used for keyboard scan.
In output mode, can be used for keyboard scan output.
4-bit output pin can be used for keyboard scan output.
It can be set input/output mode by mask option.
In output mode, have large current when output high level(can be used to drive LED).
In input mode, it can be used for keyboard scan input.
Outputs remote signal with carrier.
It can be set input/output mode by mask option.
In output mode, it can be used for keyboard scan output.
In input mode, it can be used for keyboard scan input.
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.1 2005.12.19
Page 4 of 20

4페이지










SC73C1402D 전자부품, 판매, 대치품
SC73C1402
P51: output pin, this pin is always used to select system code.
P52: output pin. It can output large current when output high level; this pin can be used to drive LED
display.
P53: Large current output port, this pin can be used to output infrared remote signal. If P53 is set to 1.this
pin outputs modulated signal with carrier whose frequency is OSC/12 (1/3 duty). If it is set to 0, this
pin output s low level signal.
When the MCU reads the P5 port, it reads the contents of the timer instead of port status.
P53 P52 P51 P50
IT3 IT2 IT1 IT0
14. Timer/counter
SC73C1402 has an on-chip 17-bit timer. The clock source of the timer is the main frequency (fmain) of the
circuit. There are timing steps from 10 steps (which generates pulses with frequency fmain/210) to 15
(fmain/215). The timer outputs pulse frequency ranging from fmain/210 to fmain/215, it can be used for timer
after releasing the HOLD mode, and it can also be used as a WDT. After release the HOLD mode released
and the timer reset instruction TMRST executed, the timer value is cleared.
15. TR
TR refers to the timer register. It selects the status of the timer mode, 4-bit write-only. The SC73C1402 has
no special instructions to read the register, so please use the following instructions: LD A, %5 or LD @LR,
%5.The corresponding relationships are: P53— IT3; P52— IT2; P51— IT1; P50— IT0.
3 210
IBNS
TIBS
TR timer register
16. IBNS
The control bit of the read timer. When the value is 0, read P53 (IT3), IT2~IT0 become 0; when the value is 1,
www.DataSheerte4aUd.co4m-bit data P53~P50 (IT3~IT0).
P53: 215/fmain
P52: 214/fmain
P51: 213/fmain
P50: 212/fmain
TIBS: only valid when IBNS=0
000: 210/fmain
50% duty
001: 211/fmain
50% duty
010: 211/fmain
75% duty
011: 212/fmain
50% duty
100: 212/fmain
101: 213/fmain
110: 213/fmain
111: 214/fmain
75% duty
50% duty
75% duty
50% duty
The value of timer increments by 1 each time a clock is coming. When executing the instruction IN %5, A=LD
A, %5 and IN %5, @LR=LD @LR, %5, the timer sends the complement value of the counter to the A and RAM.
Therefore, after reset, every bit of the read timer is set to 1.
The maximum adjustable time of the timer is 216/FMAIN. When the timer acts as a WDT and the timer is
activated, it must execute the TMRST instruction and clear the timer in 216/FMAIN’s time, otherwise, it will lead
the WDT to overflow, and cause the MCU to reset.
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.1 2005.12.19
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