MC9S12XDP512CAL Freescale, MC9S12XDP512CAL Datasheet - Page 409
MC9S12XDP512CAL
Manufacturer Part Number
MC9S12XDP512CAL
Description
Manufacturer
Freescale
Datasheet
1.MC9S12XDP512CAL.pdf
(1348 pages)
Specifications of MC9S12XDP512CAL
Cpu Family
HCS12
Device Core Size
16b
Frequency (max)
40MHz
Interface Type
CAN/I2C/SCI/SPI
Total Internal Ram Size
32KB
# I/os (max)
91
Number Of Timers - General Purpose
12
Operating Supply Voltage (typ)
2.5/5V
Operating Supply Voltage (max)
2.75/5.5V
Operating Supply Voltage (min)
2.35/3.15V
On-chip Adc
2(16-chx10-bit)
Instruction Set Architecture
CISC
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
112
Package Type
LQFP
Program Memory Type
Flash
Program Memory Size
512KB
Lead Free Status / RoHS Status
Compliant
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9.4
This section provides a complete functional description of the IICV2.
9.4.1
The IIC bus system uses a serial data line (SDA) and a serial clock line (SCL) for data transfer. All devices
connected to it must have open drain or open collector outputs. Logic AND function is exercised on both
lines with external pull-up resistors. The value of these resistors is system dependent.
Normally, a standard communication is composed of four parts: START signal, slave address transmission,
data transfer and STOP signal. They are described briefly in the following sections and illustrated in
Figure
9.4.1.1
When the bus is free, i.e. no master device is engaging the bus (both SCL and SDA lines are at logical
high), a master may initiate communication by sending a START signal.As shown in
signal is defined as a high-to-low transition of SDA while SCL is high. This signal denotes the beginning
of a new data transfer (each data transfer may contain several bytes of data) and brings all slaves out of
their idle states.
Freescale Semiconductor
9-9.
SDA
SCL
SDA
SCL
Signal
Signal
Start
Start
Functional Description
I-Bus Protocol
START Signal
MSB
MSB
AD7 AD6 AD5 AD4 AD3 AD2 AD1 R/W
AD7 AD6 AD5 AD4 AD3 AD2 AD1 R/W
1
1
2
2
Calling Address
Calling Address
3
3
4
4
5
5
Figure 9-9. IIC-Bus Transmission Signals
6
6
MC9S12XDP512 Data Sheet, Rev. 2.21
7
7
Read/
Write
Read/
Write
LSB
LSB
8
8
Ack
Ack
Bit
9
Bit
9
XX
Repeated
XXX
Signal
Start
MSB
MSB
AD7 AD6 AD5 AD4 AD3 AD2 AD1 R/W
D7
Chapter 9 Inter-Integrated Circuit (IICV2) Block Description
1
1
D6
2
2
New Calling Address
D5
3
3
Data Byte
D4
4
4
D3
5
5
D2
6
6
D1
7
7
Figure
Read/
Write
LSB
LSB
D0
8
8
Ack
No
Bit
Ack
9
No
9
Bit
9-9, a START
Signal
Stop
Signal
Stop
409
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