MC908SR12MFAER Freescale Semiconductor, MC908SR12MFAER Datasheet - Page 316
MC908SR12MFAER
Manufacturer Part Number
MC908SR12MFAER
Description
IC MCU 12K FLASH 4/8MHZ 48-LQFP
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet
1.MC908SR12MFAE.pdf
(404 pages)
Specifications of MC908SR12MFAER
Core Processor
HC08
Core Size
8-Bit
Speed
8MHz
Connectivity
I²C, SCI
Peripherals
LVD, POR, PWM, Temp Sensor
Number Of I /o
31
Program Memory Size
12KB (12K x 8)
Program Memory Type
FLASH
Ram Size
512 x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Data Converters
A/D 14x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
48-LQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Other names
MC908SR12MFAER
MC908SR12MFAERTR
MC908SR12MFAERTR
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MC908SR12MFAER
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
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Multi-Master IIC Interface (MMIIC)
17.10 SMBus Protocol Implementation
Data Sheet
316
MASTER MODE
START
SLAVE MODE
START
OPERATION:
Prepare for Master mode
ACTION:
1. Load slave address to MMADR
2. Clear MMRW
3. Load command to MMDTR
4. Set MMAST
OPERATION:
Prepare for Slave mode
ACTION:
1. Load slave address to MMADR
2. Clear MMTXAK
3. Clear MMAST
Shaded data packets indicate transmissions by the MCU
Address
Address
OPERATION:
Slave address match and
FLAGS:
MMRXIF set
MMATCH set
MMSRW depends on 8th
ACTION:
1. Check MMSRW
2. Read Slave address
check for data direction
bit of calling address byte
OPERATION:
Prepare for repeated START
FLAGS:
MMTXIF set
MMRXAK clear
ACTION:
1. Set MMRW
2. Set REPSEN
3. Clear MMTXAK
4. Load dummy ($FF) to MMDTR
0
0
ACK
ACK
Command
Command
Figure 17-20. SMBus Protocol Implementation
OPERATION:
Read and decode received command
FLAGS:
MMRXIF set
MMATCH clear
ACTION:
Load Data1 to MMDTR
ACK
ACK
OPERATION:
Slave address match and
FLAGS:
MMRXIF set
MMATCH set
MMSRW depends on 8th
ACTION:
Check MMSRW
get ready to transmit data
bit of calling address byte
START
START
Multi-Master IIC Interface (MMIIC)
OPERATION:
Get ready to receive data
FLAGS:
MMTXIF set
MMRXAK clear
ACTION:
Load dummy ($FF) to MMDTR
Address
Address
1
1
ACK
ACK
OPERATION:
Transmit data
FLAGS:
MMTXIF set
ACTION:
Load Data2 to MMDTR
RX Data1
TX Data1
OPERATION:
Read received data
FLAGS:
MMRXIF set
ACTION:
Read Data1 from MMDRR
MC68HC908SR12•MC68HC08SR12 — Rev. 5.0
OPERATION:
Transmit data
FLAGS:
MMTXIF set
MMRXAK clear
ACTION:
Load Data3 to MMDTR
OPERATION:
Read received data and prepare for STOP
FLAGS:
MMRXIF set
ACTION:
1. Set MMTXAK
2. Read Data(N-1) from MMDRR
3. Clear MMAST
ACK
ACK
OPERATION:
Last data is going to be sent
FLAGS:
MMTXIF set
MMRXAK clear
ACTION:
Load dummy ($FF) to MMDTR
ACK
ACK
Freescale Semiconductor
OPERATION:
Last data sent
FLAGS:
MMTXIF set
MMRXAK set
ACTION:
Load dummy ($FF) to MMDTR
RX DataN
TX DataN
OPERATION:
Generate STOP
FLAGS:
MMRXIF set
ACTION:
Read DataN from MMDRR
NAK
NAK
STOP
STOP
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