Z8FMC04100 ZILOG [Zilog, Inc.], Z8FMC04100 Datasheet - Page 203
Z8FMC04100
Manufacturer Part Number
Z8FMC04100
Description
Z8 Encore-R Motor Control Flash MCUs
Manufacturer
ZILOG [Zilog, Inc.]
Datasheet
1.Z8FMC04100.pdf
(402 pages)
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PS024604-1005
S
Figure 34. Data Transfer Format—Slave Transmit Transaction with 7-bit Address
Slave Address
7. The software responds by reading the I2CISTAT Register, finding the
8. The master and slave loops through steps 5 to 7 until the master detects a Not
9. The master sends the
Slave Transmit Transaction with 7-bit Address
The data transfer format for a master reading data from a slave in 7-bit address mode is
shown in Figure 37. The procedure that follows describes the I
operating as a slave in 7-bit addressing mode and transmitting data to the bus master.
1. The software configures the controller for operation as a slave in 7-bit addressing
2. The master initiates a transfer, sending the address byte. The SLAVE mode I
3. The software responds to the interrupt by reading the I2CISTAT Register, thereby
4. SCL is released and the first data byte is shifted out.
and then reading the I2CDATA Register, which clears the
accept only one more data byte, it sets the
Acknowledge instruction or runs out of data to send.
cause the I
I2CISTAT Register). Because the slave received data from the master, the software
takes no action in response to the STOP interrupt other than reading the I2CISTAT
Register to clear the
mode, as follows.
a. Initialize the
b. Optionally set the
c. Initialize the
d. Set
troller finds an address match and detects that the R/W bit = 1 (read by the master
from the slave). The I
the transaction. The
The
clearing the
byte into the I2CDATA Register. The software sets the
to enable transmit interrupts. When the master initiates the data transfer, the I
troller holds SCL Low until the software has written the first data byte to the
I2CDATA Register.
or MASTER/SLAVE mode with 7-bit addressing.
RD
bit is set to 1, indicating a Read from the slave.
IEN
2
C controller to assert the STOP interrupt (the
SAM
= 1 in the I
bit. Because
MODE
SLA[6:0]
R = 1
SAM
STOP
STOP
2
GCE
C controller acknowledges, indicating that it is ready to accept
field in the I
2
P R E L I M I N A R Y
C Control Register. Set
bit in the I2CISTAT Register is set to 1, causing an interrupt.
bit.
bit.
or
bits in the I
RD
RESTART
A
= 1, the software responds by loading the first data
2
C Mode Register for either SLAVE ONLY mode
Data
2
signal on the bus. Either of these signals can
C Slave Address Register.
NAK
bit in the I2CCTL Register.
NAK
A
= 0 in the I
TXI
RDRF
STOP
Data
2
bit in the I2CCTL Register
C Master/Slave Controller
Product Specification
bit. If the software can
bit = 1 in the
2
C Control Register.
Slave Transactions
A
RDRF
bit = 1,
2
2
P/S
C con-
C con-
181
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