Z8F0812SJ020EC Zilog, Z8F0812SJ020EC Datasheet - Page 123

• 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
Baud Rate
IR_TXD
UART’s
Clock
TXD
Transmitting IrDA Data
7-clock
delay
The baud rate is set by the UART’s Baud Rate Generator and supports IrDA standard baud
rates from 9600 baud to 115.2 Kbaud. Higher baud rates are possible, but do not meet
IrDA specifications. The UART must be enabled to use the Infrared Endec. The Infrared
Endec data rate is calculated using the following equation.
The data to be transmitted using the infrared transceiver is first sent to the UART. The
UART’s transmit signal (TXD) and baud rate clock are used by the IrDA to generate the
modulation signal (IR_TXD) that drives the infrared transceiver. Each UART/Infrared
data bit is 16-clocks wide. If the data to be transmitted is 1, the IR_TXD signal remains
low for the full 16-clock period. If the data to be transmitted is 0, a 3-clock high pulse is
output following a 7-clock low period. After the 3-clock high pulse, a 6-clock low pulse is
output to complete the full 16-clock data period.
sion. When the Infrared Endec is enabled, the UART’s TXD signal is internal to the Z8
Encore! XP
pin.
Infrared Data Rate (bits/s)
Start Bit = 0
16-clock
period
3-clock
pulse
®
F0822 Series products while the IR_TXD signal is output through the TXD
Data Bit 0 = 1
Figure 18. Infrared Data Transmission
=
---------------------------------------------------------------------------------------------
16xUART Baud Rate Divisor Value
System Clock Frequency (Hz)
Data Bit 1 = 0
Figure 18
Data Bit 2 = 1
Z8 Encore! XP
displays IrDA data transmis-
Product Specification
Infrared Encoder/Decoder
Data Bit 3 = 1
®
F0822 Series
110