EZ80F91AZ050EG Zilog, EZ80F91AZ050EG Datasheet - Page 219

• Manufacturer Part Number: EZ80F91AZ050EG
• Description: IC ACCLAIM MCU 256KB 144LQFP
• Manufacturer: Zilog
• Series: eZ80® Acclaim!®r

Specifications of EZ80F91AZ050EG

• 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, UART
• 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: 269-3867; EZ80F91AZ050EG

Table 116. SPI Transmit Shift Register (SPI_TSR = 00BCh)
Table 117. SPI Receive Buffer Register
PS019215-0910
Bit
Reset
CPU Access
Note: W = Write Only.
Bit 
Position
[7:0]
TX_DATA
Bit
Reset
CPU Access
Note: R = Read Only.
Bit 
Position
[7:0]
RX_DATA
SPI Receive Buffer Register
The SPI Receive Buffer register (SPI_RBR) is used by the SPI slave to receive data from
the serial bus. The SPIF bit must be cleared prior to a second transfer of data from the shift
register; otherwise, an overrun condition exists. In the event of an overrun, the byte that
causes the overrun is lost.
The SPI Receive Buffer Read Only register shares the same address space as the SPI
Transmit Shift Write Only register. See
Value
00h–FFh SPI transmit data.
Value
00h–FFh
W
X
X
R
7
7
Description
Description
SPI received data.
W
X
X
R
6
6
W
X
X
R
5
5
(SPI_RBR = 00BCh)
W
X
X
R
4
4
Table
W
R
X
X
3
3
117.
W
R
X
X
2
2
W
R
X
X
1
1
Product Specification
Serial Peripheral Interface
W
R
X
X
0
0
eZ80F91 MCU
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