MC908QL4MDWE Freescale Semiconductor, MC908QL4MDWE Datasheet - Page 164

• Manufacturer Part Number: MC908QL4MDWE
• Description: IC MCU 8BIT 4K FLASH 16-SOIC
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC908QL4MDWE

• 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-SOIC (0.300", 7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Slave LIN Interface Controller (SLIC) Module
delay values (cutoff values) are shown in the frequency and time domains. Note that
the filter performance under ideal conditions.
When switching between a low-speed (< 4800 bps) to a high-speed (> 40000 bps) LIN message, the
master node must allow a minimum idle time of eight bit times (of the slowest bit rate) between the
messages. This prevents a valid message at another frequency from being detected as an invalid
message.
164
1. Bit rates over 120,000 bits per second are not recommended for LIN communications, as physical layer delay between the
Clock
(MHz)
Clock
(MHz)
SLIC
SLIC
6.4
4.8
3.2
2.4
6.4
4.8
3.2
2.4
8
4
2
8
4
2
TX and RX pins can cause the stop bit of a byte to be mis-sampled as the last data bit. This could result in a byte framing
error.
Table 14-6. Maximum LIN Bit Rates for High-Speed Operation Due to Digital Receive Filter
Bit Rate
125,000
100,000
DIGITAL RX FILTER
75,000
62,500
50,000
37,500
31,250
NOT CONSIDERED
(Bits /
Bit Rate for ±1.5%
Max.
Sec)
(for Master-Slave
Communication
SLIC Accuracy
(Bits / Second)
Digital RX Filter
Maximum LIN
Table 14-7. Digital Receive Filter Absolute Cutoff (Ideal Conditions)
120,000
Set to ÷4
96,000
72,000
60,000
48,000
36,000
30,000
Min Pulse
Allowed
Width
10.0
13.3
16.0
20.0
26.7
32.0
(μs)
8.0
Digital RX Filter
(Bits / Second)
Maximum LIN
Bit Rate with
Bit Rate
166,667
133,333
100,000
83,333
66,667
50,000
41,667
(Bits /
120,000
Max.
HIGH-SPEED LIN OPERATION
Sec)
Set to ÷4
100,000
MC68HC908QL4 Data Sheet, Rev. 8
NOT RECOMMENDED FOR
75,000
62,500
50,000
37,500
31,250
Digital RX Filter
THESE PRESCALERS
Set to ÷3
(1)
Min Pulse
Allowed
Width
10.0
12.0
15.0
20.0
24.0
(μs)
7.5
6.0
Digital RX Filter
(Bits / Second)
Maximum LIN
Bit Rate with
120,000
120,000
Set to ÷3
100,000
83,333
66,667
50,000
41,667
Bit Rate
250,000
200,000
150,000
125,000
100,000
75,000
62,500
(Bits /
Max.
Sec)
(1)
(1)
Digital RX Filter
Set to ÷2
Min Pulse
Digital RX Filter
(Bits / Second)
Allowed
Maximum LIN
Bit Rate with
Width
10.0
13.3
16.0
(μs)
120,000
120,000
120,000
120,000
4.0
5.0
6.7
8.0
Set to ÷2
100,000
75,000
62,500
(1)
(1)
(1)
(1)
Bit Rate
500,000
400,000
300,000
250,000
200,000
150,000
125,000
Freescale Semiconductor
(Bits /
Max.
Sec)
Table 14-7
Digital RX Filter
Digital RX Filter
Set to ÷1
(Bits / Second)
Maximum LIN
Bit Rate with
120,000
120,000
120,000
120,000
120,000
120,000
120,000
Set to ÷1
Min Pulse
Allowed
Width
(μs)
shows
2.0
2.5
3.3
4.0
5.0
6.7
8.0
(1)
(1)
(1)
(1)
(1)
(1)
(1)