EZ80F93AZ020EC00TR Zilog, EZ80F93AZ020EC00TR Datasheet - Page 95

• Manufacturer Part Number: EZ80F93AZ020EC00TR
• Description: IC ACCLAIM MCU 64KB 100LQFP
• Manufacturer: Zilog
• Series: eZ80® Acclaim!®r

Specifications of EZ80F93AZ020EC00TR

• 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: -40°C ~ 105°C
• Package / Case: 100-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -
• Other names: EZ80F93AZ020EC00T

Real-Time Clock
PS015313-0508
System Clock
Real-Time Clock Overview
The Real-Time Clock (RTC) keeps time by maintaining a count of seconds, minutes,
hours, day-of-the-week, day-of-the-month, year, and century. The current time is kept in
24-hour format. The format for all count and alarm registers is selectable between binary
and binary-coded-decimal (BCD). The calendar operation maintains the correct day of the
month and automatically compensates for leap year. A simplified block diagram of the
RTC and the associated on-chip, low-power, 32 kHz oscillator is displayed in
Connections to an external battery supply and 32 kHz crystal network are also displayed
in
Figure 24. Real-Time Clock and 32 kHz Oscillator Block Diagram
Figure
IRQ
ADDR[15:0]
DATA[7:0]
Real-Time Clock
24.
V
RTC Clock
DD
(RTC_CTRL[4])
CLK_SEL
Enab l e
V
DD
Low-Power
32 KHz Oscillator
RTC_X
RTC_X
RTC_V
DD
OUT
IN
Crystal
32 KH z
R1
Product Specification
Battery
Real-Time Clock
Figure
C
C
24.
88