DEMO9S08EL32AUTO Freescale Semiconductor, DEMO9S08EL32AUTO Datasheet - Page 170
![DEMO BOARD EL32 AUTO](/photos/37/58/375858/demo9s08sg32bd_sml.jpg)
DEMO9S08EL32AUTO
Manufacturer Part Number
DEMO9S08EL32AUTO
Description
DEMO BOARD EL32 AUTO
Manufacturer
Freescale Semiconductor
Type
MCUr
Datasheets
1.DEMO9S08EL32.pdf
(356 pages)
2.DEMO9S08EL32.pdf
(14 pages)
3.DEMO9S08EL32.pdf
(2 pages)
Specifications of DEMO9S08EL32AUTO
Contents
Board, Cable, CD and Documentation
Processor To Be Evaluated
MC9S08EL32
Data Bus Width
8 bit
Interface Type
RS-232, USB
Operating Supply Voltage
12 V
For Use With/related Products
MC9S08EL32
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Inter-Integrated Circuit (S08IICV2)
For example, if the bus speed is 8 MHz, the table below shows the possible hold time values with different
ICR and MULT selections to achieve an IIC baud rate of 100kbps.
170
MULT
Field
ICR
7–6
5–0
IIC Multiplier Factor. The MULT bits define the multiplier factor, mul. This factor, along with the SCL divider,
generates the IIC baud rate. The multiplier factor mul as defined by the MULT bits is provided below.
00 mul = 01
01 mul = 02
10 mul = 04
11 Reserved
IIC Clock Rate. The ICR bits are used to prescale the bus clock for bit rate selection. These bits and the MULT
bits determine the IIC baud rate, the SDA hold time, the SCL Start hold time, and the SCL Stop hold time.
Table 11-5
The SCL divider multiplied by multiplier factor mul generates IIC baud rate.
SDA hold time is the delay from the falling edge of SCL (IIC clock) to the changing of SDA (IIC data).
SCL start hold time is the delay from the falling edge of SDA (IIC data) while SCL is high (Start condition) to the
falling edge of SCL (IIC clock).
SCL stop hold time is the delay from the rising edge of SCL (IIC clock) to the rising edge of SDA
SDA (IIC data) while SCL is high (Stop condition).
MULT
provides the SCL divider and hold values for corresponding values of the ICR.
0x2
0x1
0x1
0x0
0x0
MC9S08EL32 Series and MC9S08SL16 Series Data Sheet, Rev. 3
SCL Start hold time = bus period (s)
SCL Stop hold time = bus period (s)
Table 11-4. Hold Time Values for 8 MHz Bus Speed
SDA hold time = bus period (s)
Table 11-3. IICF Field Descriptions
0x0B
0x00
0x07
0x14
0x18
ICR
IIC baud rate
3.500
2.500
2.250
2.125
1.125
SDA
=
Description
-------------------------------------------- -
mul
bus speed (Hz)
×
×
×
×
SCLdivider
mul
mul
mul
Hold Times (μs)
×
×
×
SCL Start
SDA hold value
SCL Start hold value
SCL Stop hold value
3.000
4.000
4.000
4.250
4.750
SCL Stop
5.500
5.250
5.250
5.125
5.125
Freescale Semiconductor
Eqn. 11-1
Eqn. 11-2
Eqn. 11-3
Eqn. 11-4
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