MC68HC705BD3 FREESCALE [Freescale Semiconductor, Inc], MC68HC705BD3 Datasheet - Page 48

• Manufacturer Part Number: MC68HC705BD3
• Description: High-density complementary metal oxide semiconductor (HCMOS) microcontroller unit
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

7
7.2
Normally, a standard communication is composed of four parts,
They are described briefly in the following sections and illustrated in Figure 7-2.
7-2
Interrupt
SDA
SCL
Control register
1) START signal,
2) slave address transmission,
3) data transfer, and
4) STOP signal.
MEN MIEN MSTA MTX TXAK
M-Bus Protocol
control
control
SDA
SCL
START, STOP
detector and
arbitration
Figure 7-1 M-Bus Interface Block Diagram
M-Bus clock
sync logic
generator
interrupt
Status register
M-Bus
MCF MAAS MBB
M-BUS SERIAL INTERFACE
START, STOP
generator and
timing sync
MAL
Internal bus
SRW
MIF RXAK
Frequency
register
TX shift
register
control
divider
TX
MC68HC05BD3
comparator
Address
register
Address
register
RX shift
control
RX
8
TPG