Z8F042AHH020EG Zilog, Z8F042AHH020EG Datasheet - Page 145

• Manufacturer Part Number: Z8F042AHH020EG
• Description: IC ENCORE XP MCU FLASH 4K 20SSOP
• Manufacturer: Zilog
• Series: Encore!® XP®r

Specifications of Z8F042AHH020EG

• Core Processor: Z8
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: IrDA, UART/USART
• Peripherals: Brown-out Detect/Reset, LED, LVD, POR, PWM, Temp Sensor, WDT
• Number Of I /o: 17
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 128 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 7x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 20-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 269-4156; Z8F042AHH020EG

PS022517-0508
Write Transaction with a 7-Bit Address
Figure 27
indicate data transferred from the I
data transferred from the slaves to the I
Follow the steps below for a transmit operation 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 asserts the START bit of the I
6. The I
7. The I
8. After one bit of address has been shifted out by the SDA signal, the Transmit Interrupt
9. Software responds by writing the transmit data into the I
10. The I
11. If the I
12. The I
13. The I
S
to the I
Register.
is asserted (TDRE = 1).
next high period of SCL the I
Continue with
If the slave does not acknowledge, the Not Acknowledge interrupt occurs (NCKI bit is
set in the Status register, ACK bit is cleared). Software responds to the Not
Acknowledge interrupt by setting the STOP and FLUSH bits and clearing the TXI bit.
The I
NCKI bits. The transaction is complete (ignore following steps).
I
sent, the Transmit Interrupt is asserted.
2
C Data Register.
Slave Address
2
2
2
2
2
2
2
displays the data transfer format for a 7-bit addressed slave. Shaded regions
C interrupt asserts, because the I
C Controller sends the START condition to the I
C Controller loads the I
C Controller shifts the rest of the address and write bit out by the SDA signal.
C Controller sends the STOP condition on the bus and clears the STOP and
C Controller loads the contents of the I
C Controller shifts the data out of using the SDA signal. After the first bit is
2
2
C Slave sends an acknowledge (by pulling the SDA signal low) during the
C Data Register.
Figure 27. 7-Bit Addressed Slave Data Transfer Format
step
12.
W = 0
A
2
2
C Controller sets the ACK bit in the I
2
C Shift register with the contents of the I
C Controller to slaves and unshaded regions indicate
2
2
C Controller.
Data
2
C Control Register.
C Control Register to enable Transmit Interrupts.
2
2
C Data Register is empty.
C Control Register.
2
A
C Shift register with the contents of the
Z8 Encore! XP
Data
2
C Slave.
2
C Data Register.
Product Specification
A
Data
2
C Status register.
®
F0822 Series
2
C Data
I2C Controller
A/A P/S
132