CHAPTER 10 SERIAL INTERFACE FUNCTION
User’s Manual U13850EJ4V0UM
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The slave address and the eighth bit, which specifies the transfer direction as described in
(3) Transfer
direction specification
below, are together written to the IIC shift register (IICn) and are then output. Received
addresses are written to IICn (n = 0, 1).
The slave address is assigned to the higher 7 bits of IICn.
(3)
Transfer direction specification
In addition to the 7-bit address data, the master device sends 1 bit that specifies the transfer direction. When
this transfer direction specification bit has a value of 0, it indicates that the master device is transmitting data to
a slave device. When the transfer direction specification bit has a value of 1, it indicates that the master device
is receiving data from a slave device.
Figure 10-20. Transfer Direction Specification
SCLn
1
SDAn
INTIICn
2
3
4
5
6
7
8
9
AD6
AD5
AD4
AD3
AD2
AD1
AD0
R/W
Transfer direction specification
Note
Note
INTIICn is not generated if data other than a local address or extension code is received during slave
device operation.
Remark
n = 0, 1
Содержание MPD703030A
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