Z8F1601 Datasheet, PDF (135/246 Pages) Zilog, Inc. – Z8 Encore Microcontrollers with Flash Memory and 10-Bit A/D Converter

Z8F640x/Z8F480x/Z8F320x/Z8F240x/Z8F160x
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4. The I²C Controller loads the I²C Shift register with the contents of the I²C Data
register.
5. After the first bit has been shifted out, a Transmit interrupt is asserted.
6. Software responds by writing eight bits of address to the I²C Data register.
7. The I²C Controller completes shifting of the two address bits and a 0 (write).
8. The I²C slave sends an acknowledge by pulling the SDA signal Low during the next
high period of SCL.
9. The I²C Controller loads the I²C Shift register with the contents of the I²C Data
register.
10. The I²C Controller shifts out the next eight bits of address. After the first bits are
shifted, the I²C Controller generates a Transmit interrupt.
11. Software responds by setting the START bit of the I²C Control register to generate a
repeated START.
12. Software responds by writing 11110B followed by the 2-bit slave address and a 1
(read).
13. Software responds by setting the NAK bit of the I²C Control register, so that a Not
Acknowledge is sent after the first byte of data has been read. If you want to read only
one byte, software responds by setting the NAK bit of the I²C Control register.
14. After the I²C Controller shifts out the address bits mentioned in step 9, the I²C slave
sends an acknowledge by pulling the SDA signal Low during the next high period of
SCL.
15. The I²C Controller sends the repeated START condition.
16. The I²C Controller loads the I²C Shift register with the contents of the I²C Data
register.
17. The I²C Controller sends 11110B followed by the 2-bit slave read and a 1 (read).
18. The I²C slave sends an acknowledge by pulling the SDA signal Low during the next
high period of SCL.
19. The I²C slave sends a byte of data.
20. A Receive interrupt is generated.
21. Software responds by reading the I²C Data register.
22. Software responds by setting the STOP bit of the I²C Control register.
23. A NAK condition is sent to the I²C slave.
24. A STOP condition is sent to the I²C slave.
PS017609-0803
I2C Controller