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參數資料
型號: W921E843A
廠商: WINBOND ELECTRONICS CORP
元件分類: 微控制器/微處理器
英文描述: 4-BIT MICROCONTROLLER
中文描述: 4-BIT, OTPROM, 4 MHz, MICROCONTROLLER, PDIP40
封裝: DIP-40
文件頁數: 25/58頁
文件大?。?/td> 449K
代理商: W921E843A
W921E840A/W921C840
Publication Release Date: July 1999
- 25 - Revision A3
The output frequency of the row and column will be controlled by the row/column frequency control
register (RCCTL).
RCCTL register: (address = 015H, default data = 0H)
b3
b2
b1
b0
0:
1:
0:
1:
Row frequency disable
Row frequency enable
Column frequency disable
Column frequency enable
0:
1:
DTMF disable (H-Z)
DTMF enable
Reserved
The following table shows the DTMF keypad and its frequency.
1
4
7
*
2
5
8
0
3
6
9
#
R1
R2
R3
R4
C1
C2
C3
Key
R1
R2
R3
R4
C1
C2
C3
C4
Frequency
697 Hz
770 Hz
852 Hz
941 Hz
1209 Hz
1336 Hz
1477 Hz
1633 Hz
A
B
C
D
C4
6.8 Beep Tone Generator
There are four kinds of frequency that can output from the BTG pin that works as beep tone
generator. The BTG pin can output the special frequency
2 KHz, 1 KHz, 630 Hz or 520 Hz, and the
correct output frequency is decided by the OSCCTR register (address = 013H) and BTGR register
(address = 03FH) as shown below:
BTGR register: (address = 03FH, default data = 0H)
b3
b2
b1
b0
Reserved
b1
b0
0
0
0
1
1
0
1
1
Output Freq.
2K Hz
1K Hz
630 Hz
520 Hz
0: Disable beep tone generator
(BTG pin keep in high state)
1: Enable beep tone generator
If the beep tone generator is disabled by setting bit 3 of the BTGR register to zero or after power on
reset, the BTG output pin will remain in high state.
相關PDF資料
PDF描述
W921C880 4-Bit Microcontroller(4位微控制器)
W921E880A 4-Bit Microcontroller(4位微控制器)
W921E840 4-Bit Microcontroller(4位的微控制器)
W921E880 4-Bit Microcontroller(4位的微控制器)
W921F840 4-Bit Microcontroller(4位的微控制器)
相關代理商/技術參數
參數描述
W921E880 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT MICROCONTROLLER
W921E880A 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT MICROCONTROLLER
W925C240 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telephone Controller
W925C625 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-bit CID MICROCONTROLLER
W925E240 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telephone Controller