Z8F042AHH020EG Zilog, Z8F042AHH020EG Datasheet - Page 55

• Manufacturer Part Number: Z8F042AHH020EG
• Description: IC ENCORE XP MCU FLASH 4K 20SSOP
• Manufacturer: Zilog
• Series: Encore!® XP®r

Specifications of Z8F042AHH020EG

• Core Processor: Z8
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: IrDA, UART/USART
• Peripherals: Brown-out Detect/Reset, LED, LVD, POR, PWM, Temp Sensor, WDT
• Number Of I /o: 17
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 128 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 7x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 20-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 269-4156; Z8F042AHH020EG

PS022517-0508
Internal RESET
WDT Clock
V
Oscillator
Primary
CC
signal
Watchdog Timer Reset
= 3.3 V
VVBO
V
POR
remains below the POR voltage threshold (V
Reset state.
After the supply voltage again exceeds the POR voltage threshold, the device progresses
through a full System Reset sequence as described in the POR section. Following POR,
the POR status bit in the Watchdog Timer Control Register (WDTCTL) is set to 1.
Figure 7
VBO and POR threshold voltages (V
The VBO circuit can be either enabled or disabled during STOP mode. Operation during
STOP mode is set by the VBO_AO Option Bit. For information on configuring VBO_AO,
see
If the device is in NORMAL or HALT mode, WDT initiates a System Reset at time-out, if
the WDT_RES Option Bit is set to 1. This is the default (unprogrammed) setting of the
WDT_RES Option Bit. The
that the reset was initiated by the WDT.
Option Bits
Execution
Program
displays the VBO operation. See
Figure 7. Voltage Brownout Reset Operation
on page 163.
Brownout
Voltage
WDT
status bit in the WDT Control Register is set to signify
Counter Delay
VBO
POR
and V
Electrical Characteristics
POR
POR
), the VBO block holds the device in the
).
Counter Delay
Z8 Encore! XP
XTAL
Reset and Stop Mode Recovery
Product Specification
Execution
on page 185 for the
Program
®
F0822 Series
V
CC
= 3.3 V
42