EZ80F93AZ020SC00TR Zilog, EZ80F93AZ020SC00TR Datasheet - Page 114
EZ80F93AZ020SC00TR
Manufacturer Part Number
EZ80F93AZ020SC00TR
Description
IC ACCLAIM MCU 64KB 100LQFP
Manufacturer
Zilog
Series
eZ80® Acclaim!®r
Specifications of EZ80F93AZ020SC00TR
Core Processor
Z8
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, IrDA, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, WDT
Number Of I /o
24
Program Memory Size
64KB (64K x 8)
Program Memory Type
FLASH
Ram Size
4K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Oscillator Type
Internal
Operating Temperature
0°C ~ 70°C
Package / Case
100-LQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Data Converters
-
Other names
EZ80F93AZ020SC00T
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PS015313-0508
UART Transmitter Interrupt
The transmitter hold register empty interrupt is generated if there is no data available in
the hold register. The transmission complete interrupt is generated after the data in the
shift register is sent. Both interrupts can be disabled using individual interrupt enable bits
or cleared by writing data into the UARTx_THR register.
UART Receiver Interrupts
A receiver interrupt can be generated by three possible sources. The first source, a
Receiver Data Ready, indicates that one or more data bytes are received and are ready to
be read. This interrupt is generated if the number of bytes in the receiver FIFO is greater
than or equal to the trigger level. If the FIFO is not enabled, the interrupt is generated if the
receive buffer contains a data byte. This interrupt is cleared by reading the UARTx_RBR.
The second interrupt source is the receiver time-out. A receiver time-out interrupt is gen-
erated when there are fewer data bytes in the receiver FIFO than the trigger level and there
are no reads and writes to or from the receiver FIFO for four consecutive byte times.
When the receiver time-out interrupt is generated, it is cleared only after emptying the
entire receive FIFO.
The first two interrupt sources from the receiver (data ready and time-out) share an inter-
rupt enable bit.
The third source of a receiver interrupt is a line status error, indicating an error in byte
reception. This error may result from:
•
•
•
•
An interrupt due to one of the above conditions is cleared when the UARTx_LSR register
is read. In FIFO mode, a line status interrupt is generated only after the received byte with
an error reaches the top of the FIFO and is ready to be read.
A line status interrupt is activated (provided this interrupt is enabled) as long as the Read
pointer of the receiver FIFO points to the location of the FIFO that contains a byte with the
error. The interrupt is immediately cleared when the UARTx_LSR register is read. The
ERR bit of the UARTx_LSR register is active as long as an erroneous byte is present in the
receiver FIFO.
UART Modem Status Interrupt
The modem status interrupt is generated if there is any change in state of the modem status
inputs to the UART. This interrupt is cleared when the processor reads the UARTx_MSR
register.
Incorrect received parity. For 9-bit data, incorrect parity indicates detection of an
address byte
Incorrect framing; that is, the stop bit is not detected by receiver at the end of the byte
Receiver over run condition
A BREAK condition being detected on the receive data input
Universal Asynchronous Receiver/Transmitter
Product Specification
eZ80F92/eZ80F93
107
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