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參數(shù)資料
| 型號(hào)： | UPD17228CT |
| 廠商： | NEC Corp. |
| 元件分類(lèi)： | 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(jī)的小型通用紅外遙控器 |
| 文件頁(yè)數(shù)： | 30/84頁(yè) |
| 文件大?。?/td> | 393K |
| 代理商： | UPD17228CT |
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μ
PD17225, 17226, 17227, 17228
30
Data Sheet U12643EJ2V0DS00
5.
8-BIT TIMER AND REMOTE CONTROLLER CARRIER GENERATOR CIRCUIT
The
μ
PD17225 is equipped with the 8-bit timer which is mainly used to generate the leader pulse of the remote controller
signal, and to output codes.
5.1
Configuration of 8-bit Timer (with modulo function)
Figure 5-1 shows the configuration of the 8-bit timer.
As shown in this figure, the 8-bit timer consists of an 8-bit counter (TMC), an 8-bit modulo register (TMM), a comparator
that compares the value of the timer with the value of the modulo register, and a selector that selects the operation clock
of the 8-bit timer.
To start/stop the 8-bit timer, and to reset the 8-bit counter, TMEN (address 33H, bit 3) and TMRES (address 33H, bit
2) of the register file are used. To select the operation clock of the 8-bit timer, use TMCK1 (address 33H, bit 1) and TMCK0
(address 33H, bit 0) of the register file.
The value of the 8-bit counter is read by using the GET instruction through DBF (data buffer). No value can be set to
the 8-bit counter. A value is set to the modulo register by using the PUT instruction through DBF. The value of the modulo
register cannot be read.
When the value of the counter coincides with that of the modulo register, an interrupt flag (IRQTM: address 3FH, bit
0) of the register file is set.
7
6
5
4
3
2
1
0
TMC
TMM
Address
On reset
R/W
Peripheral register: 05H
00H
R
Address
On reset
R/W
Peripheral register: 06H
FFH
W
8-bit counter
7
6
5
4
3
2
1
0
8-bit modulo register
Caution Do not clear TMM to 0 (IRQTM is not set).
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| UPD17228CT-XXX | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:MICROCONTROLLER|4-BIT|UPD17K CPU|CMOS|SDIP|28PIN|PLASTIC |
| UPD17228GT | 制造商:NEC 制造商全稱(chēng):NEC 功能描述:4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| UPD17228GT-XXX | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:MICROCONTROLLER|4-BIT|UPD17K CPU|CMOS|SOP|28PIN|PLASTIC |
| UPD17228MC | 制造商:NEC 制造商全稱(chēng):NEC 功能描述:4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| UPD17228MC-XXX-5A4 | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Microcontroller |
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