Z8F160x Zilog, Z8F160x Datasheet - Page 134

• Manufacturer Part Number: Z8F160x
• Description: Z8 Encore / Microcontrollers with Flash Memory and 10 Bit A/D Converter
• Manufacturer: Zilog

PS017609-0803
Reading a Transaction with a 10-Bit Address
1. Software writes the I
2. Software asserts the START bit of the I
3. Software asserts the NAK bit of the I
4. The I
5. The I
6. The I
7. The I
8. The I
9. Software responds by reading the I
10. The I
11. A NAK interrupt is generated by the I
12. Software responds by setting the STOP bit of the I
13. A STOP condition is sent to the I
Figure 82 illustrates the receive format for a 10-bit addressed slave. The shaded regions
indicate data transferred from the I
data transferred from the slaves to the I
Figure 82. Receive Data Format for a 10-Bit Addressed Slave
The first seven bits transmitted in the first byte are
most-significant bits of the 10-bit address. The lowest bit of the first byte transferred is the
write signal.
The data transfer format for a receive operation on a 10-bit addressed slave is as follows:
1. Software writes an address
2. Software asserts the START bit of the I
3. The I
S Slave Address
1st 7 bits
data has been read by the I
high period of SCL.
2
2
2
2
2
2
2
C Controller sends the START condition.
C Controller sends the address and read bit by the SDA signal.
C slave sends an Acknowledge by pulling the SDA signal Low during the next
C Controller reads the first byte of data from the I
C Controller asserts the Receive interrupt.
C Controller sends a NAK to the I
C Controller sends the Start condition.
W=0 A Slave address
2
C Data register with a 7-bit slave address followed by a 1 (read).
2nd Byte
2
11110B
C Controller, a Not Acknowledge is sent to the I
2
C Controller to slaves and unshaded regions indicate
Z8F640x/Z8F480x/Z8F320x/Z8F240x/Z8F160x
2
C slave.
2
2
C Data register.
C Controller.
2
followed by the two address bits and a 0 (write).
C Control register so that after the first byte of
2
A S Slave Address
C Controller.
2
2
C Control register.
C Control register.
2
C slave.
1st 7 bits
11110XX
2
C Control register.
2
. The two bits
C slave.
R=1 A Data A Data A P
XX
Z8 Encore!
I2C Controller
are the two
2
C slave.
®
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