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參數(shù)資料
| 型號： | UPD17147CTA1 |
| 廠商： | NEC Corp. |
| 英文描述： | SMALL, GENERAL-PURPOSE 4-BIT SINGLE-CHIP MICROCONTROLLERS |
| 中文描述： | 小，通用4位單晶片微控制器 |
| 文件頁數(shù)： | 52/102頁 |
| 文件大?。?/td> | 408K |
| 代理商： | UPD17147CTA1 |
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52
μ
PD17145(A1), 17147(A1), 17149(A1)
15.2 Operation Mode of 3-Wire Serial Interface
The serial interface can operate in the following two modes. When the serial interface function is selected,
the P0D
2
/SI pin always inputs data in synchronization with the serial clock.
8-bit transmission/reception mode (simultaneous transmission/reception)
8-bit reception mode (SO pin: high-impedance state)
Table 15-2. Operation Modes of Serial Interface
SIOEN
SIOHIZ
P0D
0
/SI Pin
P0D
1
/SO Pin
Operation Mode of Serial Interface
1
0
SI
SO
8-bit transmission/reception mode
1
1
SI
P0D
1
(input)
8-bit reception mode
0
×
P0D
0
(I/O)
P0D
1
(I/O)
General-purpose port mode
×
: Don't care
(1) 8-bit transmission/reception mode (simultaneous transmission/reception)
Input or output of serial data is controlled by the serial clock. The MSB of the shift register is output to the
SO line at the falling edge of the serial clock (SCK pin signal). The contents of the shift register are shifted
1 bit at the rising edge of the serial clock. At the same time, the data on the SI line is loaded to the LSB
of the shift register.
The serial clock counter (3-bit counter) sets an interrupt request flag (IRQSIO <- 1) each time it has counted
eight serial clocks.
Figure 15-2. Timing in 8-Bit Transmission/Reception Mode (Simultaneous Transmission/Reception)
Remark
DI: serial data input
DO: serial data output
1
2
3
4
5
6
7
8
DI7
DI6
DI5
DI4
DI3
DI2
DI1
DO7
DO6
DO5
DO4
DO3
DO2
DO1
DO0
DI0
SCK pin
SI pin
SO pin
IRQSIO
Starts transfer in synchronization with falling of SCK pin
Executes instruction that writes "1" to SIOTS (transfer start command)
End of transfer
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| UPD17149 | SMALL, GENERAL-PURPOSE 4-BIT SINGLE-CHIP MICROCONTROLLERS |
| UPD17149CT | SMALL, GENERAL-PURPOSE 4-BIT SINGLE-CHIP MICROCONTROLLERS |
| UPD17147GT | SMALL, GENERAL-PURPOSE 4-BIT SINGLE-CHIP MICROCONTROLLERS |
| UPD17147GTA1 | SMALL, GENERAL-PURPOSE 4-BIT SINGLE-CHIP MICROCONTROLLERS |
| UPD17149GTA1 | SMALL, GENERAL-PURPOSE 4-BIT SINGLE-CHIP MICROCONTROLLERS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UPD17147GT | 制造商:NEC 制造商全稱:NEC 功能描述:SMALL, GENERAL-PURPOSE 4-BIT SINGLE-CHIP MICROCONTROLLERS |
| UPD17147GTA1 | 制造商:NEC 制造商全稱:NEC 功能描述:SMALL, GENERAL-PURPOSE 4-BIT SINGLE-CHIP MICROCONTROLLERS |
| UPD17149 | 制造商:NEC 制造商全稱:NEC 功能描述:SMALL, GENERAL-PURPOSE 4-BIT SINGLE-CHIP MICROCONTROLLERS |
| UPD17149CT | 制造商:NEC 制造商全稱:NEC 功能描述:SMALL, GENERAL-PURPOSE 4-BIT SINGLE-CHIP MICROCONTROLLERS |
| UPD17149CTA1 | 制造商:NEC 制造商全稱:NEC 功能描述:SMALL, GENERAL-PURPOSE 4-BIT SINGLE-CHIP MICROCONTROLLERS |
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