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參數(shù)資料
| 型號(hào)： | UPD17242UC-XXX-5A4 |
| 元件分類(lèi)： | 微控制器/微處理器 |
| 英文描述： | 4-BIT, MROM, 4.5 MHz, MICROCONTROLLER, PDSO30 |
| 封裝： | 0.300 INCH, PLASTIC, SSOP-30 |
| 文件頁(yè)數(shù)： | 45/102頁(yè) |
| 文件大?。?/td> | 953K |
| 代理商： | UPD17242UC-XXX-5A4 |
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47
Data Sheet U15002EJ1V1DS
PD17240, 17241, 17242, 17243, 17244, 17245, 17246
4.
CLOCK GENERATOR
4.1
Instruction Execution Time (CPU Clock) Selection
The
PD17246 is equipped with a clock oscillator that supplies clocks to the CPU and peripheral hardware.
Instruction execution time can be changed in two steps (normal mode and high-speed mode) without changing the
oscillation frequency.
To change the instruction execution time, change the mode of SYSCK (RF: address 02H) of the register file by
using the POKE instruction.
Note, that the mode is actually only changed when the instruction next to the POKE instruction has been executed.
When using the high-speed mode, pay attention to the supply voltage. (Refer to 14. ELECTRICAL SPECIFICATIONS.)
After reset, the normal mode is set.
32
10
00
0
SYSCK
Address
RF: 02H
SYSCK
After reset
0H
R/W
0
1
Selects instruction execution time
Normal mode 32/fX (8 s)
High-speed mode 16/fX (4 s)
Values in parentheses apply to operation when the system clock fX = 4 MHz.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| UPD178F054 | 78K/0 Series for Instructions | User＇s Manual[10/2001] |
| UPD178F124 | 78K/0 Series for Instructions | User＇s Manual[10/2001] |
| UPD178F098GF-3BA-A | 8-BIT, FLASH, MICROCONTROLLER, PQFP100 |
| UPD17P136BGT | MICROCONTROLLER, PDSO28 |
| UPD1913C | Consumer IC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UPD17243 | 制造商:NEC 制造商全稱(chēng):NEC 功能描述:4-BIT SINGLE-CHIP MICROCONTROLLERS FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTERS |
| UPD17243MC-XXX-5A4 | 制造商:NEC 制造商全稱(chēng):NEC 功能描述:4-BIT SINGLE-CHIP MICROCONTROLLERS FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTERS |
| UPD17244 | 制造商:NEC 制造商全稱(chēng):NEC 功能描述:4-BIT SINGLE-CHIP MICROCONTROLLERS FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTERS |
| UPD17244MC-XXX-5A4 | 制造商:NEC 制造商全稱(chēng):NEC 功能描述:4-BIT SINGLE-CHIP MICROCONTROLLERS FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTERS |
| UPD17245 | 制造商:NEC 制造商全稱(chēng):NEC 功能描述:4-BIT SINGLE-CHIP MICROCONTROLLERS FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTERS |
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