參數(shù)資料
型號(hào): 16F872
廠商: Microchip Technology Inc.
英文描述: CAT 5E CROSSOVER PATCH CORD CABLE GREEN 10 FT
中文描述: 28引腳,8位閃存微控制器的CMOS
文件頁數(shù): 66/160頁
文件大?。?/td> 2600K
代理商: 16F872
PIC16F872
DS30221A-page 66
Preliminary
1999 Microchip Technology Inc.
9.2.5
MASTER MODE
Master mode of operation is supported by interrupt
generation on the detection of the START and STOP
conditions. The STOP (P) and START (S) bits are
cleared from a RESET or when the MSSP module is
disabled. Control of the I
2
C bus may be TACKEN when
the P bit is set, or the bus is idle with both the S and P
bits clear.
In Master mode, the SCL and SDA lines are manipu-
lated by the MSSP hardware.
The following events will cause the SSP Interrupt Flag
bit, SSPIF, to be set (SSP Interrupt if enabled):
START condition
STOP condition
Data transfer byte transmitted/received
Acknowledge transmit
Repeated Start
FIGURE 9-9:
SSP BLOCK DIAGRAM (I
2
C MASTER MODE)
Read
Write
SSPSR
Start bit, Stop bit,
Acknowledge
Generate
Start bit detect,
Stop bit detect
Write collision detect
Clock Arbitration
State counter for
end of XMIT/RCV
SSPBUF
Internal
Data Bus
Set/Reset, S, P, WCOL (SSPSTAT)
Set SSPIF, BCLIF
Reset ACKSTAT, PEN (SSPCON2)
Shift
Clock
MSb
LSb
SDA
SCL
SCL in
Bus Collision
SDA in
R
c
c
(
SSPADD<6:0>
Baud
Rate
Generator
SSPM<3:0>,
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