MC9S08QG8CDNE Freescale Semiconductor, MC9S08QG8CDNE Datasheet - Page 162
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MC9S08QG8CDNE
Manufacturer Part Number
MC9S08QG8CDNE
Description
IC MCU 8K FLASH 8MHZ 8-SOIC
Manufacturer
Freescale Semiconductor
Series
HCS08r
Datasheet
1.MC9S08QG8CDTER.pdf
(314 pages)
Specifications of MC9S08QG8CDNE
Core Processor
HCS08
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, SCI, SPI
Peripherals
LVD, POR, PWM, WDT
Number Of I /o
4
Program Memory Size
8KB (8K x 8)
Program Memory Type
FLASH
Ram Size
512 x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 3.6 V
Data Converters
A/D 4x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
8-SOIC (3.9mm Width)
Processor Series
S08QG
Core
HCS08
Data Bus Width
8 bit
Data Ram Size
512 B
Interface Type
SCI/SPI
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
12
Number Of Timers
1
Operating Supply Voltage
1.8 V to 3.6 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
EWS08
Development Tools By Supplier
DEMO9S08QG8E
Minimum Operating Temperature
- 40 C
On-chip Adc
8-ch x 10-bit
For Use With
DEMO9S08QG8E - BOARD DEMO FOR MC9S08QG8
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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Inter-Integrated Circuit (S08IICV1)
160
MULT
Field
ICR
7:6
5:0
IIC Multiplier Factor — The MULT bits define the multiplier factor mul. This factor is used along with the SCL
divider to generate 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 are used to
define the SCL divider and the SDA hold value. The SCL divider multiplied by the value provided by the MULT
register (multiplier factor mul) is used to generate IIC baud rate.
SDA hold time is the delay from the falling edge of the SCL (IIC clock) to the changing of SDA (IIC data). The ICR
is used to determine the SDA hold value.
Table 11-4
be used to set IIC baud rate and SDA hold time. For example:
Table 11-4
hold value of 9.
If the generated SDA hold value is not acceptable, the MULT bits can be used to change the ICR. This will result
in a different SDA hold value.
IIC baud rate = bus speed (Hz)/(mul * SCL divider)
SDA hold time = bus period (s) * SDA hold value
Bus speed = 8 MHz
MULT is set to 01 (mul = 2)
Desired IIC baud rate = 100 kbps
IIC baud rate = bus speed (Hz)/(mul * SCL divider)
100000 = 8000000/(2*SCL divider)
SCL divider = 40
SDA hold time = bus period (s) * SDA hold value
SDA hold time = 1/8000000 * 9 = 1.125 μs
provides the SCL divider and SDA hold values for corresponding values of the ICR. These values can
shows that ICR must be set to 0B to provide an SCL divider of 40 and that this will result in an SDA
MC9S08QG8 and MC9S08QG4 Data Sheet, Rev. 5
Table 11-3. IICF Register Field Descriptions
Description
Freescale Semiconductor
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