EZ80F93AZ020SC00TR Zilog, EZ80F93AZ020SC00TR Datasheet - Page 140
![IC ACCLAIM MCU 64KB 100LQFP](/photos/6/76/67664/269-100-lqfp_sml.jpg)
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
Available stocks
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Part Number
Manufacturer
Quantity
Price
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PS015313-0508
SPI Functional Description
Table 71. SPI Clock Phase and Clock Polarity Operation
When a master transmits to a slave device via the MOSI signal, the slave device responds
by sending data to the master via the master's MISO signal. The resulting implication is a
full-duplex transmission, with both data out and data in synchronized with the same clock
signal. Thus the byte transmitted is replaced by the byte received and eliminates the
requirement for separate transmit-empty and receive-full status bits. A single status bit,
SPIF, is used to signify that the I/O operation is completed, see the SPI Status Register
(SPI_SR) on page 137.
The SPI is double-buffered on Read, but not on Write. If a Write is performed during data
transfer, the transfer occurs uninterrupted, and the Write is unsuccessful. This condition
causes the WRITE COLLISION (WCOL) status bit in the SPI_SR register to be set. After
a data byte is shifted, the SPIF flag of the SPI_SR register is set.
In SPI MASTER mode, the SCK pin functions as an output. It idles High or Low, depend-
ing on the CPOL bit in the SPI_CTL register, until data is written to the shift register. Data
transfer is initiated by writing to the transmit shift register, SPI_TSR. Eight clocks are then
generated to shift the 8 bits of transmit data out the MOSI pin while shifting in 8 bits of
data on the MISO pin. After transfer, the SCK signal idles.
In SPI SLAVE mode, the start logic receives a logic Low from the SS pin and a clock
input at the SCK pin, and the slave is synchronized to the master. Data from the master is
received serially from the slave MOSI signal and loads the 8-bit shift register. After the
8-bit shift register is loaded, its data is parallel transferred to the Read buffer. During a
Write cycle data is written into the shift register, then the slave waits for the SPI master to
initiate a data transfer, supply a clock signal, and shift the data out on the slave's MISO
signal.
If the CPHA bit in the SPI_CTL register is 0, a transfer begins when SS pin signal goes
Low and the transfer ends when SS goes High after eight clock cycles on SCK. When the
CPHA bit is set to 1, a transfer begins the first time SCK becomes active while SS is Low
and the transfer ends when the SPIF flag gets set.
CPHA
0
0
1
1
CPOL
0
1
0
1
Transmit
Falling
Falling
Rising
Rising
Edge
SCK
Receive
Falling
Falling
Rising
Rising
Edge
SCK
State
SCK
High
High
Low
Low
Idle
Product Specification
Serial Peripheral Interface
eZ80F92/eZ80F93
Characters?
Between
SS High
Yes
Yes
No
No
133
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