Z8F042AHJ020SC00TR Zilog, Z8F042AHJ020SC00TR Datasheet - Page 111

• Manufacturer Part Number: Z8F042AHJ020SC00TR
• Description: IC ENCORE XP MCU FLASH 4K 28SSOP
• Manufacturer: Zilog
• Series: Encore!® XP®r

Specifications of Z8F042AHJ020SC00TR

• 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: 23
• 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 8x10b
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 28-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: Z8F042AHJ020SC00T

PS022825-0908
Transmitting Data using the Interrupt-Driven Method
6. Check the TDRE bit in the UART Status 0 register to determine if the Transmit Data
7. Write the UART Control 1 register to select the outgoing address bit.
8. Set the Multiprocessor Bit Transmitter (MPBT) if sending an address byte, clear it if
9. Write the data byte to the UART Transmit Data register. The transmitter automatically
10. Make any changes to the Multiprocessor Bit Transmitter (
11. To transmit additional bytes, return to
The UART Transmitter interrupt indicates the availability of the Transmit Data register to
accept new data for transmission. Follow the steps below to configure the UART for inter-
rupt-driven data transmission:
1. Write to the UART Baud Rate High and Low Byte registers to set the appropriate baud
2. Enable the UART pin functions by configuring the associated GPIO Port pins for
3. Execute a DI instruction to disable interrupts.
4. Write to the Interrupt control registers to enable the UART Transmitter interrupt and
5. Write to the UART Control 1 register to enable MULTIPROCESSOR (9-bit) mode
6. Set the MULTIPROCESSOR Mode Select (MPEN) to Enable MULTIPROCESSOR
7. Write to the UART Control 0 register to:
8. Execute an EI instruction to enable interrupts.
register is empty (indicated by a 1). If empty, continue to
register is full (indicated by a 0), continue to monitor the TDRE bit until the Transmit
Data register becomes available to receive new data.
sending a data byte.
transfers the data to the Transmit Shift register and transmits the data.
and MULTIPROCESSOR mode is enabled.
rate.
alternate function operation.
set the acceptable priority.
functions, if MULTIPROCESSOR mode is appropriate.
mode.
–
–
–
Set the transmit enable bit (TEN) to enable the UART for data transmission.
Enable parity, if appropriate and if MULTIPROCESSOR mode is not enabled, and
select either even or odd parity.
Set or clear CTSE to enable or disable control from the remote receiver using the
CTS pin.
Step
5.
Universal Asynchronous Receiver/Transmitter
Z8 Encore! XP
Step
MPBT
Product Specification
7. If the Transmit Data
) value, if appropriate
®
F082A Series
100