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PIC16F877T-20PQ 参数 Datasheet PDF下载

PIC16F877T-20PQ图片预览
型号: PIC16F877T-20PQ
PDF下载: 下载PDF文件 查看货源
内容描述: 8位微控制器\n [8-Bit Microcontroller ]
分类和应用: 微控制器
文件页数/大小: 200 页 / 3338 K
品牌: ETC [ ETC ]
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PIC16F87X  
9.1.2  
SLAVE MODE  
While in sleep mode, the slave can transmit/receive  
data. When a byte is received, the device will wake-up  
from sleep.  
In slave mode, the data is transmitted and received as  
the external clock pulses appear on SCK. When the  
last bit is latched, the interrupt flag bit SSPIF (PIR1<3>)  
is set.  
Note: When the SPI module is in Slave Mode  
with SS pin control enabled, (SSP-  
CON<3:0> = 0100) the SPI module will  
reset if the SS pin is set to VDD.  
While in slave mode, the external clock is supplied by  
the external clock source on the SCK pin. This external  
clock must meet the minimum high and low times as  
specified in the electrical specifications.  
Note: If the SPI is used in Slave Mode with  
CKE = '1', then SS pin control must be  
enabled.  
FIGURE 9-3: SPI MODE TIMING (SLAVE MODE WITH CKE = 0)  
SS (optional)  
SCK (CKP = 0)  
SCK (CKP = 1)  
bit2  
bit7  
bit6  
bit5  
bit3  
bit1  
bit0  
bit4  
SDO  
SDI (SMP = 0)  
bit7  
bit0  
SSPIF  
FIGURE 9-4: SPI MODE TIMING (SLAVE MODE WITH CKE = 1)  
SS  
SCK (CKP = 0)  
SCK (CKP = 1)  
SDO  
bit2  
bit7  
bit6  
bit5  
bit3  
bit1  
bit0  
bit4  
SDI (SMP = 0)  
SSPIF  
bit7  
bit0  
1999 Microchip Technology Inc.  
DS30292B-page 69  
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