Z8F022ASJ020SC Zilog, Z8F022ASJ020SC Datasheet - Page 42
![IC ENCORE XP MCU FLASH 2K 28SOIC](/photos/6/91/69136/269-28-soic_sml.jpg)
Z8F022ASJ020SC
Manufacturer Part Number
Z8F022ASJ020SC
Description
IC ENCORE XP MCU FLASH 2K 28SOIC
Manufacturer
Zilog
Series
Encore!® XP®r
Specifications of Z8F022ASJ020SC
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
23
Program Memory Size
2KB (2K x 8)
Program Memory Type
FLASH
Eeprom Size
64 x 8
Ram Size
512 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 3.6 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
0°C ~ 70°C
Package / Case
28-SOIC (7.5mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
269-3355
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
Z8F022ASJ020SC
Manufacturer:
Zilog
Quantity:
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Table 11. Reset Status Register (RSTSTAT)
BITS
FIELD
RESET
R/W
ADDR
PS022825-0908
Reset or Stop Mode Recovery Event
Power-On Reset
Reset using RESET pin assertion
Reset using Watchdog Timer time-out
Reset using the On-Chip Debugger (OCTCTL[1] set to 1)
Reset from STOP Mode using DBG Pin driven Low
Stop Mode Recovery using GPIO pin transition
Stop Mode Recovery using Watchdog Timer time-out
POR
R
7
POR—Power-On Reset Indicator
If this bit is set to 1, a Power-On Reset event occurs. This bit is reset to 0 if a WDT
time-out or Stop Mode Recovery occurs. This bit is also reset to 0 when the register is
read.
STOP—Stop Mode Recovery Indicator
If this bit is set to 1, a Stop Mode Recovery occurs. If the STOP and WDT bits are both set
to 1, the Stop Mode Recovery occurs because of a WDT time-out. If the STOP bit is 1 and
the WDT bit is 0, the Stop Mode Recovery was not caused by a WDT time-out. This bit is
reset by a Power-On Reset or a WDT time-out that occurred while not in STOP mode.
Reading this register also resets this bit.
WDT—Watchdog Timer Time-Out Indicator
If this bit is set to 1, a WDT time-out occurs. A POR resets this pin. A Stop Mode Recov-
ery from a change in an input pin also resets this bit. Reading this register resets this bit.
This read must occur before clearing the WDT interrupt.
EXT—External Reset Indicator
If this bit is set to 1, a Reset initiated by the external RESET pin occurs. A Power-On
Reset or a Stop Mode Recovery from a change in an input pin resets this bit. Reading this
register resets this bit.
Reserved—Must be 0.
LVD—Low Voltage Detection Indicator
If this bit is set to 1 the current state of the supply voltage is below the low voltage
detection threshold. This value is not latched but is a real-time indicator of the supply volt-
age level.
See descriptions below
STOP
R
6
WDT
R
5
EXT
R
4
0
Reset, Stop Mode Recovery, and Low Voltage Detection
FF0H
R
3
0
POR
Z8 Encore! XP
Reserved
1
0
0
1
1
0
0
R
2
0
STOP
Product Specification
0
0
0
0
0
1
1
R
1
0
®
WDT
F082A Series
0
0
1
0
0
0
1
LVD
EXT
R
0
0
0
1
0
0
0
0
0
31
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