- 您现在的位置：买卖IC网 > PDF目录223608 > COP8SGR928V8 (National Semiconductor Corporation) 8-Bit CMOS ROM Based and OTP Microcontrollers with 8k to 32k Memory, Two Comparators and USART PDF资料下载
参数资料
| 型号： | COP8SGR928V8 |
| 厂商： | National Semiconductor Corporation |
| 英文描述： | 8-Bit CMOS ROM Based and OTP Microcontrollers with 8k to 32k Memory, Two Comparators and USART |
| 中文描述： | 8位的CMOS基于ROM和OTP微控制器具有8K到32K的内存，2个比较器和USART |
| 文件页数： | 38/62页 |
| 文件大小： | 913K |
| 代理商： | COP8SGR928V8 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页当前第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页
12.0 MICROWIRE/PLUS (Continued)
arrangement with the internal clock source is called the
Master
mode
of
operation.
Similarly,
operating
the
MICROWIRE/PLUS arrangement with an external shift clock
is called the Slave mode of operation.
The CNTRL register is used to configure and control the
MICROWIRE/PLUS mode. To use the MICROWIRE/PLUS,
the MSEL bit in the CNTRL register is set to one. In the
master mode, the SK clock rate is selected by the two bits,
SL0 and SL1, in the CNTRL register.
Table 10 details the
different clock rates that may be selected.
TABLE 10. MICROWIRE/PLUS
Master Mode Clock Select
SL1
SL0
SK Period
0
2xt
C
0
1
4xt
C
1
x
8xt
C
Where tC is the instruction cycle clock
12.1 MICROWIRE/PLUS OPERATION
Setting the BUSY bit in the PSW register causes the
MICROWIRE/PLUS to start shifting the data. It gets reset
when eight data bits have been shifted. The user may reset
the BUSY bit by software to allow less than 8 bits to shift. If
enabled, an interrupt is generated when eight data bits have
been shifted. The device may enter the MICROWIRE/PLUS
mode either as a Master or as a Slave.
Figure 28 shows how
two microcontroller devices and several peripherals may be
interconnected using the MICROWIRE/PLUS arrangements.
WARNING
The SIO register should only be loaded when the SK clock is
in the idle phase. Loading the SIO register while the SK clock
is in the active phase, will result in undefined data in the SIO
register.
Setting the BUSY flag when the input SK clock is in the
active phase while in the MICROWIRE/PLUS is in the slave
mode may cause the current SK clock for the SIO shift
register to be narrow. For safety, the BUSY flag should only
be set when the input SK clock is in the idle phase.
12.1.1 MICROWIRE/PLUS Master Mode Operation
In the MICROWIRE/PLUS Master mode of operation the
shift clock (SK) is generated internally. The MICROWIRE
Master always initiates all data exchanges. The MSEL bit in
the CNTRL register must be set to enable the SO and SK
functions onto the G Port. The SO and SK pins must also be
selected as outputs by setting appropriate bits in the Port G
configuration register. In the slave mode, the shift clock
stops after 8 clock pulses.
Table 11 summarizes the bit
settings required for Master mode of operation.
10131732
FIGURE 28. MICROWIRE/PLUS Application
COP8SG
Family
www.national.com
43
相关PDF资料 |
PDF描述 |
|---|---|
| COP8SGR928V9 | 8-Bit CMOS ROM Based and OTP Microcontrollers with 8k to 32k Memory, Two Comparators and USART |
| COPCSH984XXX/WM | 8-BIT, MROM, 10 MHz, MICROCONTROLLER, PDSO28 |
| CP-8-D-2-TS1-TP | INTERCONNECTION DEVICE |
| CP2-SAB1100#NAME | TWO PART BOARD CONNECTOR |
| CP2-SAB1250#NAME | TWO PART BOARD CONNECTOR |
相关代理商/技术参数 |
参数描述 |
|---|---|
| COP8-SKFLASH-00 | 功能描述:开发板和工具包 - 其他处理器 DEV STARTER KIT RoHS:否 制造商:Freescale Semiconductor 产品:Development Systems 工具用于评估:P3041 核心:e500mc 接口类型:I2C, SPI, USB 工作电源电压: |
| COP8-SKFLASH-01 | 功能描述:开发板和工具包 - 其他处理器 COP8 5V FLASH STARTER KIT RoHS:否 制造商:Freescale Semiconductor 产品:Development Systems 工具用于评估:P3041 核心:e500mc 接口类型:I2C, SPI, USB 工作电源电压: |
| COP8-SW-COP8C | 制造商:NSC 制造商全称:National Semiconductor 功能描述:8-Bit CMOS Flash Microcontroller with 8k Memory, Dual Op Amps, Virtual EEROM, Temperature Sensor,10-Bit A/D and Brownout Reset |
| COP8-SW-COP8CW | 制造商:NSC 制造商全称:National Semiconductor 功能描述:8-Bit CMOS Flash Microcontroller with 8k Memory, Dual Op Amps, Virtual EEROM, Temperature Sensor,10-Bit A/D and Brownout Reset |
| COP8-SW-EWCOP8 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:8-Bit CMOS Flash Microcontroller with 8k Memory, Dual Op Amps, Virtual EEROM, Temperature Sensor,10-Bit A/D and Brownout Reset |
发布紧急采购，3分钟左右您将得到回复。