SC73C1602NE-XXXG 查看數據表（PDF） - Silan Microelectronics

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SC73C1602NE-XXXG

4-BIT MCU FOR REMOTE CONTROLLER(MASK TYPE)

Silan Microelectronics 

14.PORT

SC73C1602 has 4 groups of I/O ports, totally 16 pins. Each group can operate in both input and output mode

(except P53). Details are as follows:

P0 port: P00-P03, 4-bit input/output port. The PR1.0 determines the port operation mode. In input mode, it has an

internal pull-down resistor and can be used for keyboard scan input. When the input level is high, it can release

the HOLD mode. In output mode, it can be used for keyboard scan output.

P1 port: P10-P13, same as P0 port, PR1.1 determines the port operation mode.

P2 port: P20-P23, same as P0 port, PR1.2 determines the port operation mode.

P5 port: P50-P52, same as P0 port.

P53: large current output port, this pin is used to output infrared remote signal. If P53 is set to 1, this pin outputs

modulated signal with carrier. If it is set to 0, it outputs low level voltage.

15. Timer/counter

SC73C1602 has two internal timers:

One is a 17-bit timer. The clock source of the timer is main frequency (fmain) of the circuit. There are timing steps

from 10 (which generates pulses with frequency fmain/210) to 15 (fmain/215). The timer can output pulse

frequency ranging from fmain/210 to fmain/215, and can be used for timer after releasing the HOLD mode. It can

also be used as a WDT. After the HOLD mode released and the timer reset instruction TMRST executed, the

timer value is cleared.

The other timer is a carrier generator. Setting different length of high and low level time span respectively

through programming, it generates various different duty and frequency carriers.

16. TR

Timer register, it selects the status of the timer mode, 4-bit write-only. SC73C1602 has no special instructions to

read the register, so it uses the following instructions: LD A, TM or LD @LL, TM.

3

2

1

0

IBNS

TIBS

TR timer register

17. IBNS

The control bit of the read timer. When the value is 0, it reads TM3 (IT3), and IT2~IT0 become 0. When the value

is 1, it reads 4-bit data TM3~TM0(IT3~IT0).

TM3: 215/fmain

TM2: 214/fmain

TM1: 213/fmain

TM0: 212/fmain

Example: when the crystal oscillator select 455KHz, the corresponding time of port P50 is 212÷455Ĭ9ms. This

means the time from TM=1111B to 1101 is 9ms, and the time from TM=1111B to 1110 is 4.5ms.See the following

program:

LD

A#1000B

LD

TM,A

TMRST

HANGZHOU SILAN MICROELECTRONICS CO.,LTD

Http: www.silan.com.cn

REV:2.5 2009.07.20

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