MC68HC908SR12CFA Freescale Semiconductor, MC68HC908SR12CFA Datasheet - Page 308

• Manufacturer Part Number: MC68HC908SR12CFA
• Description: MICROCONTROLLER 48 PIN
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908SR12CFA

• 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): 2.7 V ~ 5.5 V
• Data Converters: A/D 14x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Other names: Q1145673

Multi-Master IIC Interface (MMIIC)
17.7.6 MMIIC Data Receive Register (MMDRR)
Data Sheet
308
Address:
If the calling master does not return an acknowledge bit (MMRXAK = 1),
the module will release the SDA line for master to generate a STOP or
repeated START condition. The data in the MMDTR will not be
transferred to the output circuit until the next calling from a master. The
transmit buffer empty flag remains cleared (MMTXBE = 0).
In master mode, the data in MMDTR will be transferred to the output
circuit when:
If the slave does not return an acknowledge bit (MMRXAK = 1), the
master will generate a STOP or repeated START condition. The data in
the MMDTR will not be transferred to the output circuit. The transmit
buffer empty flag remains cleared (MMTXBE = 0).
The sequence of events for slave transmit and master transmit are
illustrated in
When the MMIIC module is enabled, MMEN = 1, data in this read-only
register depends on whether module is in master or slave mode.
In slave mode, the data in MMDRR is:
Reset:
Read: MMRD7
Write:
•
•
the module receives an acknowledge bit (MMRXAK = 0), after
setting master transmit mode (MMRW = 0), and the calling
address has been transmitted; or
the previous data in the output circuit has be transmitted and the
receiving slave returns an acknowledge bit, indicated by a
received acknowledge bit (MMRXAK = 0).
Figure 17-9. MMIIC Data Receive Register (MMDRR)
$004D
Bit 7
Multi-Master IIC Interface (MMIIC)
0
Figure
= Unimplemented
MMRD6
6
0
17-12.
MMRD5
5
0
MC68HC908SR12•MC68HC08SR12 — Rev. 5.0
MMRD4
4
0
MMRD3
3
0
MMRD2
Freescale Semiconductor
2
0
MMRD1
1
0
MMRD0
Bit 0
0