EZ80F91AZA50EG Zilog, EZ80F91AZA50EG Datasheet - Page 226

• Manufacturer Part Number: EZ80F91AZA50EG
• Description: IC ACCLAIM MCU 256KB 144LQFP
• Manufacturer: Zilog
• Series: eZ80® AcclaimPlus!™r

Specifications of EZ80F91AZA50EG

• Core Processor: Z8
• Core Size: 8-Bit
• Speed: 50MHz
• Connectivity: Ethernet, I²C, IrDA, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 144-LQFP
• Processor Series: EZ80F91x
• Core: eZ80
• Data Bus Width: 8 bit
• Data Ram Size: 16 KB
• Interface Type: I2C, IrDA, SPI
• Maximum Clock Frequency: 50 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 4
• Operating Supply Voltage: 3 V to 3.6 V
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: eZ80F910300ZCOG
• Minimum Operating Temperature: - 40 C
• For Use With: 269-4712 - KIT DEV ENCORE 32 SERIES269-4671 - BOARD ZDOTS SBC Z80ACCLAIM PLUS269-4561 - KIT DEV FOR EZ80F91 W/C-COMPILER269-4560 - KIT DEV FOR EZ80F91 W/C-COMPILER
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Details
• Other names: 269-4563

PS027001-0707
Operating Modes
must send this repeated START condition or STOP condition at the same position in the
format frame. In other words, arbitration is not allowed between:
•
•
•
Clock Synchronization for Handshake
The clock-synchronizing mechanism functions as a handshake, enabling receivers to cope
with fast data transfers, on either a byte or a bit level. The byte level allows a device to
receive a byte of data at a fast rate, but allows the device more time to store the received
byte or to prepare another byte for transmission. Slaves hold the SCL line Low after recep-
tion and acknowledge the byte, forcing the master into a Wait state until the slave is ready
for the next byte transfer in a handshake procedure.
Master Transmit
In MASTER TRANSMIT mode, the I
Enter MASTER TRANSMIT mode by setting the STA bit in the I2C_CTL register to 1.
The I
When a START condition is transmitted, the IFLG bit is 1 and the status code in the
I2C_SR register is
loaded with either a 7-bit slave address or the first part of a 10-bit slave address, with the
lsb cleared to 0 to specify TRANSMIT mode. The IFLG bit must now be cleared to 0 to
prompt the transfer to continue.
After the 7-bit slave address (or the first part of a 10-bit address) plus the Write bit are
transmitted, the IFLG is set again. A number of status codes are possible in the I2C_SR
register. See
A repeated START condition and a data bit.
A STOP condition and a data bit.
A repeated START condition and a STOP condition.
2
C then tests the I
Table 118
08h
2
. Before this interrupt is serviced, the I2C_DR register must be
on page 219.
C bus and transmits a START condition when the bus is free.
2
C transmits a number of bytes to a slave receiver.
Product Specification
I
2
C Serial I/O Interface
eZ80F91 ASSP
218