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參數(shù)資料
| 型號(hào)： | UPD17072GB |
| 廠商： | NEC Corp. |
| 英文描述： | 4-BIT SINGLE-CHIP MICROCONTROLLER WITH HARDWARE FOR DIGITAL TUNING SYSTEM |
| 中文描述： | 4位單芯片的數(shù)字調(diào)諧系統(tǒng)硬件單片機(jī) |
| 文件頁(yè)數(shù)： | 116/226頁(yè) |
| 文件大小： | 1250K |
| 代理商： | UPD17072GB |
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μ
PD17072,17073
116
14.2.1 Setting 2-/3-wire mode
The serial interface uses two pins in the two-wire mode: SCK/P0B2 and SO1/SI/P0B3.
The SCK/P0B2 pin is used as a shift clock input/output pin, and the SO1/SI/P0B3 pin is used as a serial data input/
output pin. The SO0/P1C0 pin is not used for the serial interface and is set in the general-purpose output port mode
by the SIOHIZ flag.
In this way, the serial interface operates in the two-wire mode.
In the three-wire mode, three pins, SCK/P0B2, SO0/P1C0, and SO1/SI/P0B3 are used.
The SCK/P0B2 is used as a shift clock input/output pin, the SO0/P1C0 pin is used as a serial data output pin, and
the SO1/SI/P0B3 pin is used as a serial data input pin.
Unlike in the two-wire mode, the SO0/P1C0 pin is used as a serial data output pin according to the setting of the
SIOHIZ flag. The SO1/SI/P0B3 pin is used as a serial data input pin according to the setting of the SIOSEL flag.
In this way, the serial interface operates in the three-wire mode.
14.2.2 Selecting data input/output using 2-wire serial interface
In the two-wire mode, the SO1/SI/P0B3 pin is used as an input/output pin for serial data.
Whether the SO1/SI/P0B3 pin is used as a serial data input pin (SI pin) or serial data output pin (SO1 pin) is specified
by the SIOSEL flag (refer to
Figure 14-3 Configuration of Serial I/O Mode Select Register
).
14.3 Clock Control Block
The clock control block generates a clock when the internal clock is used (master operation), and controls clock
output timing.
The frequency f
SC
of the internal clock is set by the SIOCK0 and SIOCK1 flags of the serial I/O clock select register.
Figure 14-2 shows the configuration and function of the serial I/O clock select register.
For the clock generation timing, refer to
14.7 Operation of Serial Interface
.
14.4 Clock Counter
The clock counter counts the shift clock output or input from the shift clock pin (SCK/P0B2 pin).
Because the clock counter directly reads the status of the clock pin, it cannot identify whether the clock is an internal
clock or an external clock.
The contents of the clock counter cannot be directly read by software.
For the operation and timing chart of the clock counter, refer to
14.7 Operation of Serial Interface
.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UPD17072GB-XXX-1A7 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller |
| UPD17072GB-XXX-9EU | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller |
| UPD17073 | 制造商:NEC 制造商全稱:NEC 功能描述:4-BIT SINGLE-CHIP MICROCONTROLLER WITH HARDWARE FOR DIGITAL TUNING SYSTEM |
| UPD17073GB | 制造商:NEC 制造商全稱:NEC 功能描述:4-BIT SINGLE-CHIP MICROCONTROLLER WITH HARDWARE FOR DIGITAL TUNING SYSTEM |
| UPD17073GB-XXX-1A7 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller |
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