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參數資料
| 型號： | W742C814 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 4位微控制器 |
| 英文描述： | 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| 中文描述： | 4位單片機的小型通用紅外遙控器 |
| 文件頁數： | 25/46頁 |
| 文件大小： | 704K |
| 代理商： | W742C814 |
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W742C814
Publication Release Date: February 12, 2003
- 25 -
Revision A2
The W742C81D is reset either by a power-on reset or by using the external
RES
pin. The initial
state of the W742C81D after the reset function is executed is described below Table 4.
Table 4. The initial state after the reset function is executed
Program Counter (PC)
000H
WDTR Registers
Reset
BUZCR Registers
Reset
ACC, CF, ZF Registers
Reset
MR0, MR1, PAGE Registers
Reset
PSR0, SCR, TM0, TM1 Registers
Reset
IEF, HEF, HCF, PEF, EVF, SEF Flags
Reset
WRP, DBKR, PAGE Registers
Reset
Timer 0 Input Clock
F
OSC
/4
Timer 1 Input Clock
F
OSC
MFP Output
Low
DTMF Output
Hi-Z
Input/Output Ports RA, RB, RD
Input mode
Output Port RE
High
RA, RB Ports Output Type
CMOS type
RC Ports Pull-high Resistors
Disable
Input Clock of the Watchdog Timer
F
OSC
/2048
LCD Display
OFF
6.16 Input/Output Ports RA, RB & RD
Port RA consists of pins RA.0 to RA.3. Port RB consists of pins RB.0 to RB.3. Port RD consists of pins
RD.0 to RD.3. At initial reset, input/output ports RA, RB and RD are all in input mode. When RA, RB
are used as output ports, CMOS or NMOS open drain output type can be selected by the PM0
register. But when RD is used as output port, the output type is just fixed to be CMOS output type.
Each pin of port RA, RB and RD can be specified as input or output mode independently by the PM1,
PM2 and PM5 registers. The MOVA R, RA or MOVA R, RB or MOVA R, RD instructions operate the
input functions and the MOV RA, R or MOV RB, R or MOV RD, R operate the output functions. For
more details, refer to the instruction table and Figure 6-11 and Figure 6-12.
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| W742E813 | 4-BIT MICROCONTROLLER |
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| W742S819 | 4-BIT TELEPHONE CONTROLLER |
| W742S81A | 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
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相關代理商/技術參數 |
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| W742C816 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Microcontroller |
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| W742C81A | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT MICROCONTROLLER |
| W742CE811 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT MICROCONTROLLER |
| W742E | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4 BIT MICROCONTROLLER |
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