EZ80F91AZ050EG Zilog, EZ80F91AZ050EG Datasheet - Page 180

• 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 90. Real-Time Clock Alarm Hours Register
PS019215-0910
Bit
Reset
CPU Access
Note: X = Unchanged by RESET; R/W = Read/Write.
Binary-Coded Decimal Operation (BCD_EN = 1)
Bit Position
[7:4]
ATEN_HRS
[3:0]
AHRS
Binary Operation (BCD_EN = 0)
Bit Position
[7:0]
AHRS
Real-Time Clock Alarm Hours Register
This register contains the alarm hours value. The value in the RTC_AHRS register is
unchanged by a RESET. The current setting of BCD_EN determines whether the 
values in this register are binary (BCD_EN = 0) or binary-coded decimal (BCD_EN =
1). See
Value
00h–17h The alarm hours value.
Value Description
0–2
0–9
Table
The tens digit of the alarm hours value.
The ones digit of the alarm hours value.
R/W
X
7
Description
90.
R/W
X
6
R/W
X
5
R/W
X
4
(RTC_AHRS = 00EAh)
R/W
X
3
R/W
X
2
R/W
X
1
Product Specification
R/W
X
0
Real-Time Clock
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