Z8F0812SJ020EC Zilog, Z8F0812SJ020EC Datasheet - Page 182

• Manufacturer Part Number: Z8F0812SJ020EC
• Description: IC ENCORE MCU FLASH 8K 28SOIC
• Manufacturer: Zilog
• Series: Encore!® XP®r

Specifications of Z8F0812SJ020EC

• Core Processor: Z8
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, IrDA, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 19
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 28-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -
• Other names: 269-3228

PS022517-0508
Figure 35. Connecting the On-Chip Oscillator to an External RC Network
An external resistance value of 45 kΩ is recommended for oscillator operation with an
external RC network. The minimum resistance value to ensure operation is 40 kΩ. The
typical oscillator frequency can be estimated from the values of the resistor (R in kΩ) and
capacitor (C in pF) elements using the below equation:
Figure 36
function of the capacitor (C in pF) employed in the RC network assuming a 45 kΩ exter-
nal resistor. For very small values of C, the parasitic capacitance of the oscillator XIN pin
and the printed circuit board should be included in the estimation of the oscillator fre-
quency.
It is possible to operate the RC oscillator using only the parasitic capacitance of the pack-
age and printed circuit board. To minimize sensitivity to external parasites, external capac-
itance values in excess of 20 pF are recommended.
Oscillator Frequency (kHz)
on page 170 displays the typical (3.3 V and 25
V
DD
=
--------------------------------------------------------------- -
(
R
C
0.4
×
R
X
1
×
IN
×10
C
)
6
+
(
4
×
C
)
Z8 Encore! XP
0
C) oscillator frequency as a
Product Specification
®
On-Chip Oscillator
F0822 Series
169