EZ80F91AZA50EG Zilog, EZ80F91AZA50EG Datasheet - Page 128

• 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
Watchdog Timer Reset Register
The WDT Reset register (see
when an
occurs between the writing of
does not occur prior to completion. Any value other than
register after the
the timer to be reset.
Table 49. Watchdog Timer Reset Register
Bit
Reset
CPU Access
Note: X = Undefined; W = Write Only.
Bit
Position
[7:0]
WDT_RR
A5h
value followed by a
A5h
Value Description
A5h
5Ah
value requires that the sequence of Writes (
The first Write value required to reset the WDT prior to a time-
out.
The second Write value required to reset the WDT prior to a
time-out. If an A5h, 5Ah sequence is written to WDT_RR, the
WDT timer is reset to its initial count value and counting
resumes.
W
X
7
Table 49
A5h
5Ah
value and the
W
X
6
value is written to this register. Any amount of time
) is an 8-bit Write only register. The WDT is reset
W
X
5
5Ah
(WDT_RR = 0094h)
W
X
4
value, so long as the WDT time-out
5Ah
W
X
3
written to the WDT Reset
A5h
Product Specification
,
W
X
5Ah
2
eZ80F91 ASSP
) be restarted for
Watchdog Timer
W
X
1
W
X
0
120