Microchip Technology dsPIC30F - Page 541

© 2004 Microchip Technology Inc. DS70068C-page 21-27
Section 21. Inter-Integrated Circuit (I
2
C)
Inter-Integrated
Circuit (I
2
C)
21
Figure 21-17: Master Message (10-bit Transmission)
1
- Setting the SEN bit starts a Start event.
AKDT
ACKEN
SEN
SCL
SDA
SCL
SDA
I2CTRN
TBF
I2CRCV
RBF
MI2CIF
ACKSTAT
1 2 3 4 5 6 7 8
A9A8
9
A
PEN
RCEN
1 2 3 4 5 6 7 8
D3D2D1D0D7D6D5D4A7A6A5A4A3A2A1A0
1 2 3 4 5 6 7 8 9
W01 1 1 1
RSEN
1 2 3 4 5 6 7 8 9
1 32
9
A
1 2 3 4 5 6 7 8 9
AA
4 5 6
7
2
- Writing the I2CTRN register starts a master transmission. The data is the first
3
- Writing the I2CTRN register starts a master transmission. The data is the second
4
- Writing the I2CTRN register starts a master transmission. The data is the first
- Setting the PEN bit starts a master Stop event.
byte of the address. byte of the address. byte of the message data.
D3D2D1D0D7D6D5D4D3D2D1D0D7D6D5D4
A
5
- Writing the I2CTRN register starts a master transmission. The data is the second
byte of the message data.
6
- Writing the I2CTRN register starts a master transmission. The data is the third
byte of the message data.
7
(Master) (Master)
(Slave) (Slave)
MI2CIF cleared by user software.