MC68HC908BD48IFB Freescale Semiconductor, MC68HC908BD48IFB Datasheet - Page 189
MC68HC908BD48IFB
Manufacturer Part Number
MC68HC908BD48IFB
Description
IC MCU 48K FLASH 6MHZ USB 44PQFP
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet
1.MC908BD48IBE.pdf
(288 pages)
Specifications of MC68HC908BD48IFB
Core Processor
HC08
Core Size
8-Bit
Speed
6MHz
Connectivity
I²C, USB
Peripherals
POR, PWM
Number Of I /o
32
Program Memory Size
48KB (48K x 8)
Program Memory Type
FLASH
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Data Converters
A/D 6x8b
Oscillator Type
Internal
Operating Temperature
0°C ~ 85°C
Package / Case
44-QFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Available stocks
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Part Number
Manufacturer
Quantity
Price
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Part Number:
MC68HC908BD48IFB
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
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14.5.6 Multi-Master IIC Data Receive Register (MMDRR)
MC68HC908BD48
Freescale Semiconductor
—
Rev. 2.1
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:
Figure 14-6. Multi-Master IIC Data Receive Register (MMDRR)
•
•
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).
$004F
Bit 7
Multi-Master IIC Interface (MMIIC)
0
Figure
= Unimplemented
MMRD6
6
0
14-7.
MMRD5
5
0
MMRD4
4
0
MMRD3
3
0
Multi-Master IIC Interface (MMIIC)
MMRD2
2
0
MMRD1
1
0
Data Sheet
MMRD0
Bit 0
0
189
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