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參數資料
| 型號： | MC68HC05P4ADW |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28 |
| 封裝： | SOIC-28 |
| 文件頁數： | 25/72頁 |
| 文件大?。?/td> | 400K |
| 代理商： | MC68HC05P4ADW |
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MC68HC05P4A Data Sheet, Rev. 7.1
Freescale Semiconductor
31
Chapter 7
Simple Serial Input/Output Port (SIOP)
7.1 Introduction
This device includes a simple synchronous serial input/output (SIOP) port. The SIOP is a 3-wire
master/slave system including serial clock (SCK), serial data input (SDI), and serial data output (SDO). A
mask programmable option determines whether the SIOP is most significant bit (MSB) or least significant
bit (LSB) first.
Figure 7-1. SIOP Block Diagram
7.2 Signal Format
The SIOP signal format is described here.
7.2.1 Serial Clock (SCK)
The state of SCK between transmissions must be logic 1. The first falling edge of SCK signals the
beginning of a transmission. At this time, the first bit of received data is accepted at the SDI pin and the
first bit of transmitted data is presented at the SDO pin. Data is captured at the SDI pin on the rising edge
of SCK. Subsequent falling edges shift the data and accept or present the next bit. The transmission is
ended upon the eighth rising edge of SCK. The maximum frequency of SCK in slave mode is equal to E
(bus clock) divided by four. That is, for a 4-MHz oscillator input, E becomes 2 MHz and the maximum SCK
frequency is 0.5 MHz. There is no minimum SCK frequency.
In master mode, the format is identical except that the SCK pin is an output and the shift clock now
originates internally. The master mode transmission frequency is fixed at E/4.
8-BIT SHIFT REGISTER
D
Q
R
C
RESET
SDO
SCK
SDI
MSB/LSB MASK OPTION
DATA BUS
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MC68HC05P4DW | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNIT |
| MC68HC05P4P | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNIT |
| MC68HC05P6 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNIT |
| MC68HC05P6_1 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNIT |
| MC68HC05P8 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNIT |
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