Z8F042AHJ020SC00TR Zilog, Z8F042AHJ020SC00TR Datasheet - Page 146

• Manufacturer Part Number: Z8F042AHJ020SC00TR
• Description: IC ENCORE XP MCU FLASH 4K 28SSOP
• Manufacturer: Zilog
• Series: Encore!® XP®r

Specifications of Z8F042AHJ020SC00TR

• 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: 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 8x10b
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 28-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: Z8F042AHJ020SC00T

Comparator
Operation
PS022825-0908
Caution:
The Z8 Encore! XP
compares two analog input signals. These analog signals may be external stimulus from a
pin (CINP and/or CINN) or internally generated signals. Both a programmable voltage
reference and the temperature sensor output voltage are available internally. The output is
available as an interrupt source or can be routed to an external pin.
When the positive comparator input exceeds the negative input by more than the specified
hysteresis, the output is a logic HIGH. When the negative input exceeds the positive by
more than the hysteresis, the output is a logic LOW. Otherwise, the comparator output
retains its present value. See
The comparator may be powered down to reduce supply current. See
ister 0
di
ld cmp0, r0 ; load some new configuration
nop
Comparator
Because of the propagation delay of the comparator, it is not recommended to enable or
reconfigure the comparator without first disabling interrupts and waiting for the
comparator output to settle. Doing so can result in spurious interrupts. The following
example describes how to safely enable the comparator:
Reference
Internal
CINP Pin
Temperature
Sensor
REFLVL
CINN Pin
on page 34 for details.
Figure 20. Comparator Block Diagram
®
F082A Series devices feature a general purpose comparator that
INPSEL
INNSEL
Table 137
on page 233 for details.
+
-
Z8 Encore! XP
Product Specification
To
COUT
Pin
To Interrupt
Controller
Power Control Reg-
®
F082A Series
Comparator
135