MC9S08GT32ACFDE Freescale, MC9S08GT32ACFDE Datasheet - Page 215

• Manufacturer Part Number: MC9S08GT32ACFDE
• Manufacturer: Freescale

Specifications of MC9S08GT32ACFDE

• Cpu Family: HCS08
• Device Core Size: 8b
• Frequency (max): 40MHz
• Interface Type: I2C/SCI/SPI
• Total Internal Ram Size: 2KB
• # I/os (max): 39
• Number Of Timers - General Purpose: 4
• Operating Supply Voltage (typ): 2.5/3.3V
• Operating Supply Voltage (max): 3.6V
• Operating Supply Voltage (min): 1.8/2.08V
• On-chip Adc: 8-chx10-bit
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 48
• Package Type: QFN EP
• Program Memory Type: Flash
• Program Memory Size: 32KB
• Lead Free Status / RoHS Status: Compliant

13.4
This section provides a complete functional description of the IIC module.
13.4.1
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. A 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:
The STOP signal should not be confused with the CPU STOP instruction. The IIC bus system
communication is described briefly in the following sections and illustrated in
Freescale Semiconductor
SDA
SCL
SDA
SCL
•
•
•
•
SIGNAL
SIGNAL
START
START
START signal
Slave address transmission
Data transfer
STOP signal
MSB
MSB
AD7 AD6 AD5 AD4 AD3 AD2 AD1 R/W
Functional Description
AD7 AD6 AD5 AD4 AD3 AD2 AD1 R/W
1
1
IIC Protocol
2
2
CALLING ADDRESS
CALLING ADDRESS
3
3
4
4
5
5
6
6
Figure 13-8. IIC Bus Transmission Signals
7
7
READ/
WRITE
READ/
WRITE
LSB
LSB
MC9S08GB60A Data Sheet, Rev. 2
8
8
ACK
ACK
BIT
BIT
9
9
XX
REPEATED
SIGNAL
XXX
START
MSB
MSB
AD7 AD6 AD5 AD4 AD3 AD2 AD1 R/W
D7
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
Inter-Integrated Circuit (S08IICV1)
Figure
READ/
WRITE
LSB
LSB
D0
8
8
ACK
BIT
NO
ACK
BIT
NO
9
9
13-8.
SIGNAL
SIGNAL
STOP
STOP
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