Z8F042AHH020EG Zilog, Z8F042AHH020EG Datasheet - Page 180

• 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

On-Chip Oscillator
Operating Modes
Crystal Oscillator Operation
PS022517-0508
Z8 Encore! XP
crystals with frequencies from 32 kHz to 20 MHz. In addition, the oscillator can support
external RC networks with oscillation frequencies up to 4 MHz or ceramic resonators with
oscillation frequencies up to 20 MHz. This oscillator generates the primary system clock
for the internal eZ8 CPU and the majority of the on-chip peripherals. Alternatively, the
X
external clock generator is used, the X
When configured for use with crystal oscillators or external clock drivers, the frequency of
the signal on the X
internal clock divider). In RC operation, the system clock is driven by a clock divider
(divide by 2) to ensure 50% duty cycle.
Z8 Encore! XP F0822 Series products support 4 different oscillator modes:
•
•
•
•
The oscillator mode is selected through user-programmable Option Bits. For more infor-
mation, see
Figure 34
external fundamental-mode, parallel-resonant crystal operating at 20 MHz. Recommended
20 MHz crystal specifications are provided in
optional and limits total power dissipation by the crystal. The printed circuit board layout
must add no more than 4 pF of stray capacitance to either the X
tion does not occur, reduce the values of capacitors C1 and C2 to decrease loading.
IN
On-chip oscillator configured for use with external RC networks (<4 MHz).
Minimum power for use with very low frequency crystals (32 kHz to 1.0 MHz).
Medium power for use with medium frequency crystals or ceramic resonators
(0.5 MHz to 10.0 MHz).
Maximum power for use with high frequency crystals or ceramic resonators (8.0 MHz
to 20.0 MHz).
input pin can also accept a CMOS-level clock input signal (32 kHz–20 MHz). If an
on page 168 displays a recommended configuration for connection with an
Option Bits
®
F0822 Series products feature an on-chip oscillator for use with external
IN
input pin determines the frequency of the system clock (that is, no
on page 163.
OUT
pin must be left unconnected.
Table 91
on page 168. Resistor R1 is
Z8 Encore! XP
IN
Product Specification
or X
OUT
®
On-Chip Oscillator
F0822 Series
pins. If oscilla-
167