EZ80F91AZA50EG Zilog, EZ80F91AZA50EG Datasheet - Page 347

• 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

On-Chip Oscillators
PS027001-0707
Primary Crystal Oscillator Operation
The eZ80F91 features two on-chip oscillators for use with an external crystal. The primary
oscillator generates the system clock for the internal CPU and the majority of the on-chip
peripherals. Alternatively, the X
If an external clock generator is used, the X
ary oscillator drives a 32 kHz crystal to generate the time-base for the Real-Time Clock.
Figure 63
external 50 MHz, 3
tions are provided in
board layout must add not more than 4 pF of stray capacitance to either the X
pins. If oscillation does not occur, try removing C1 for testing and decreasing the value of
C
2
by the estimated stray capacitance to decrease loading.
on page 340 illustrates a recommended configuration for connection with an
rd
-overtone, parallel-resonant crystal. Recommended crystal specifica-
Table 229
IN
on page 340 and
input pin also accepts a CMOS-level clock input signal.
OUT
pin must be left unconnected. The second-
Table 230
on page 341. Printed circuit
Product Specification
On-Chip Oscillators
eZ80F91 ASSP
IN
or X
OUT
339