HD6432160 RENESAS [Renesas Technology Corp], HD6432160 Datasheet - Page 466
HD6432160
Manufacturer Part Number
HD6432160
Description
Hitachi 16-Bit Single-Chip Microcomputer
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
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16.4.2
Initialize the IIC by the procedure shown in figure 16.7 before starting transmission/reception of
data.
Note: Be sure to modify the ICMR register after transmit/receive operation has been completed.
16.4.3
In I
data, and the slave device returns an acknowledge signal.
Figure 16.8 shows the sample flowchart for the operations in master transmit mode.
Rev. 2.0, 08/02, page 426 of 788
2
C bus format master transmit mode, the master device outputs the transmit clock and transmit
If the ICMR register is modified during transmit/receive operation, bit counter BC2 to
BC0 will be modified erroneously, thus causing incorrect operation.
<< Start transmit/receive operation >>
Initialization
Master Transmit Operation
Set MSTP4 = 0 (IIC_0)
Set IICE = 1 in STCR
Set ICE = 0 in ICCR
Set ICE = 1 in ICCR
Set SAR and SARX
MSTP3 = 0 (IIC_1)
Start initialization
Set DDCSWR
(MSTPCRL)
Set STCR
Set ICMR
Set ICCR
Set ICSR
Set ICXR
Figure 16.7 Sample Flowchart for IIC Initialization
Cancel module stop mode
Enable the CPU accessing to the IIC control register and data register
Set IIC communication format
(SWE, SW, IE, and IF)
Enable SAR and SARX to be accessed
Set the first and second slave addresses and IIC communication format
(SVA6 to SVA0, FS, SVAX6 to SVAX0, and FSX)
Enable ICMR and ICDR to be accessed
Use SCL/SDA pin as an IIC port
Set acknowledge bit (ACKB)
Set transfer rate (IICX)
Set communication format, wait insertion, and transfer rate
(MLS, WAIT, CKS2 to CKS0)
Enable interrupt
(STOPIM, HNDS, ALIE, ALSL, FNC1, and FNC0)
Set interrupt enable, transfer mode, and acknowledge decision
(IEIC, MST, TRS, and ACKE)
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