MC908QL4MDTER Freescale Semiconductor, MC908QL4MDTER Datasheet - Page 148

• Manufacturer Part Number: MC908QL4MDTER
• Description: IC MCU 8BIT 4K FLASH 16-TSSOP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC908QL4MDTER

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: LIN (Local Interconnect Network)
• Peripherals: LVD, POR, PWM
• Number Of I /o: 13
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: FLASH
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 6x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 16-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Slave LIN Interface Controller (SLIC) Module
14.8.7 SLIC Data Length Code Register
The SLIC data length code register (SLCDLC) is the primary functional control register for the SLIC
module during normal LIN operations. It contains the data length code of the message buffer, indicating
how many bytes of data are to be sent or received, as well as the checksum mode control and transmit
enabling bit.
TXGO — SLIC Transmit Go
CHKMOD — LIN Checksum Mode
DLC — Data Length Control Bits
148
This bit controls whether the SLIC module is sending or receiving data bytes. This bit is automatically
reset to 0 after a transmit operation is complete or an error is encountered and transmission has been
aborted.
CHKMOD is used to decide what checksum method to use for this message frame. Resets after error
code or message frame complete. CHKMOD must be written (if desired) only after the reception of an
identifier and before the reception or transmission of data bytes. Writing this bit to a one clears the
current checksum calculation. The one exception is when a byte framing error is detected and the
checksum calculation should be reset. (See Byte Framing Error description in section
Mode
The value of the bits indicate the number of data bytes in message. Values $00–$07 are for “normal”
LIN messaging. Values $08–$3F are for “extended” LIN messaging.
1 = Initiate SLIC transmit
0 = SLIC receive data
1 = Checksum calculated without the identifier byte (LIN spec <= 1.3)
0 = Checksum calculated with the identifier byte included
Operation.)
The SLIC assumes the user has loaded the proper data into the message buffer and will begin
transmitting the number of bytes indicated in the SLCDLC bits. If the number of bytes is greater
than 8, the first 8 bytes will be transmitted and an interrupt will be triggered (if unmasked) for
the user to enter the next bytes of the message. If the number of bytes is 8 or fewer, the SLIC
will transmit the appropriate number of bytes and automatically append the checksum to the
transmission.
(SAE J2602/LIN 2.0)
Reset:
Read:
Write:
TXGO
Figure 14-11. SLIC Data Length Code Register (SLCDLC)
Bit 7
0
DLC[5:0]
CHKMOD
$3D
$3E
$00
$01
$02
$3F
...
6
0
Table 14-4. Data Length Control
MC68HC908QL4 Data Sheet, Rev. 8
DLC5
5
0
Message Data Length (Number of Bytes)
DLC4
0
4
DLC3
3
0
62
63
64
...
1
2
3
DLC2
2
0
DLC1
1
0
Freescale Semiconductor
DLC0
Bit 0
0
14.8.6.1 LIN