Z8F6423FT00ZEM Zilog, Z8F6423FT00ZEM Datasheet - Page 158
![KIT ICE Z8 ENCORE 64K 80QFP](/photos/9/27/92758/z8f6423ft00zem_sml.jpg)
Z8F6423FT00ZEM
Manufacturer Part Number
Z8F6423FT00ZEM
Description
KIT ICE Z8 ENCORE 64K 80QFP
Manufacturer
Zilog
Series
Z8 Encore!®r
Type
In-Circuit Emulator Systemr
Specifications of Z8F6423FT00ZEM
Contents
Emulator Board, Cables, Software and Documentation
For Use With/related Products
Z8 Encore! 80-QFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
269-3397
- Current page: 158 of 297
- Download datasheet (9Mb)
PS019921-0308
Address Only Transaction with a 7-bit Address
reading the I
next data byte.
In the situation where software determines if a slave with a 7-bit address is responding
without sending or receiving data, a transaction can be done which only consists of an
address phase.
with a 7-bit address will acknowledge. As an example, this transaction can be used after a
‘write’ has been done to a EEPROM to determine when the EEPROM completes its inter-
nal write operation and is once again responding to I
Acknowledge, the transaction can be repeated until the slave does Acknowledge.
Follow the steps below for an address only transaction to a 7-bit addressed slave:
1. Software asserts the IEN bit in the I
2. Software asserts the TXI bit of the I
3. The I
4. Software responds to the TDRE bit by writing a 7-bit slave address plus write bit (=0)
5. Software sets the START and STOP bits of the I
6. The I
7. The I
8. Software polls the STOP bit of the I
9.
to the I
write operation.
bit.
register.
bit when the address only transaction is completed.
ACK bit is = 1. If the slave does not acknowledge, the ACK bit is = 0. The NCKI
interrupt does not occur in the not acknowledge case because the STOP bit was set.
Software checks the ACK bit of the I
Figure 27. 7-Bit Address Only Transaction Format
2
2
2
C interrupt asserts, because the I
C Controller sends the START condition to the I
C Controller loads the I
2
C Data register. As an alternative this could be a read operation instead of a
2
C Data register. Once the I
Figure 27
S
Slave Address
displays this ‘address only’ transaction to determine if a slave
2
C Shift register with the contents of the I
W = 0 A/A
2
2
2
2
C Control register. Hardware deasserts the STOP
C Control register.
2
C data register has been read, the I
C Control register to enable Transmit interrupts.
C Status register. If the slave acknowledged, the
2
C Data register is empty (TDRE = 1)
2
2
C Control register and clears the TXI
C transactions. If the slave does not
P
Z8 Encore! XP
2
C slave.
Product Specification
®
F64XX Series
2
2
C reads the
C Data
I2C Controller
144
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