MC908LJ12CFUE Freescale Semiconductor, MC908LJ12CFUE Datasheet - Page 232

• Manufacturer Part Number: MC908LJ12CFUE
• Description: IC MCU 12K FLASH 4/8MHZ 64-QFP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC908LJ12CFUE

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: IRSCI, SPI
• Peripherals: LCD, LVD, POR, PWM
• Number Of I /o: 32
• Program Memory Size: 12KB (12K x 8)
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 6x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-QFP
• Processor Series: HC08LJ
• Core: HC08
• Data Bus Width: 8 bit
• Data Ram Size: 512 B
• Interface Type: SCI, SPI
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 4
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: FSICEBASE, M68EML08LJLKE, ZK-HC08LX-A, M68CBL05CE
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 6 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

Infrared Serial Communications
13.6 Infrared Functional Description
Technical Data
232
NOTE:
Infrared Serial Communications Interface Module (IRSCI)
The infrared sub-module receives two clock sources from the SCI
module: SCI_R16XCLK and SCI_R32XCLK. Both reference clocks are
used to generate the narrow pulses during data transmission.
The SCI_R16XCLK and SCI_R32XCLK are internal clocks with
frequencies that are 16 and 32 times the baud rate respectively. Both
SCI_R16XCLK and SCI_R32XCLK clocks are used for transmitting
data. The SCI_R16XCLK clock is used only for receiving data.
For proper SCI function (transmit or receive), the bus clock MUST be
programmed to at least 32 times that of the selected baud rate.
When the infrared sub-module is disabled, signals on the TxD and RxD
pins pass through unchanged to the SCI module.
Figure 13-3
The infrared sub-module provides the capability of transmitting narrow
pulses to an infrared LED and receiving narrow pulses and transforming
them to serial bits, which are sent to the SCI module. The infrared sub-
module receives two clocks from the SCI. One of these two clocks is
selected as the base clock to generate the 3/16, 1/16, or 1/32 bit width
narrow pulses during transmission.
SCI_R32XCLK
SCI_R16XCLK
SCI_RxD
SCI_TxD
shows the structure of the infrared sub-module.
Figure 13-3. Infrared Sub-Module Diagram
MUX
IR_RxD
TNP[1:0]
TRANSMIT
ENCODER
DECODER
RECEIVE
IR_TxD
MC68HC908LJ12
Freescale Semiconductor
IREN
MUX
—
Rev. 2.1
TxD
RxD