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HC705E5GRS/D Datasheet(PDF) 87 Page - NXP Semiconductors

Part # HC705E5GRS/D
Description  General Release Specification
PDF  148 Pages
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

HC705E5GRS/D Datasheet(HTML) 87 Page - NXP Semiconductors

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Motorola Bus (M Bus) Interface
M-Bus Registers
MC68HC705E5 — Rev. 1.0
General Release Specification
Motorola Bus (M Bus) Interface
Figure 11-9. Flowchart of M-Bus Interrupt Routine
CLEAR MIF
MASTER
TX/RX
LAST BYTE
TO BE READ
LAST BYTE
TRANSMITTED
TX
RX
RXAK=0
N
WRITE NEXT
BYTE TO MDR
GENERATE
STOP SIGNAL
Y
N
Y
SET TXAK = 1
N
N
GENERATE
STOP SIGNAL
Y
READ DATA FROM
MDR AND STORE
CLEAR MAL
Y
N
MAAS = 1
MAAS = 1
SRW = 1
Y
TX/RX
READ MDR
AND STORE
SET
TX MODE
WRITE
TO MDR
SET
RX MODE
DUMMY READ
FROM MDR
ACK FROM
RECEIVER
TX NEXT
BYTE
SWITCH TO
RX MODE
DUMMY READ
FROM MDR
ARBITRATION
LOST
LAST 2nd BYTE
TO BE READ
RTI
N
Y
TX
RX
N
Y
N
N (WRITE)
Y (READ)
YN
MODE
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com



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