GENERAL RELEASE SPECIFICATION
August 27, 1998
CLEAR SMIF
Y
N
MASTER MODE
TX
RX
Y
Y
ARBITRATION
LOST
TX/RX
N
CLEAR SMAL
Y
LAST BYTE
LAST BYTE
TRANSMITTED
Y
TO BE READ
SMAAS = 1
N
N
N
N
SMAAS = 1
Y
RX
LAST 2nd BYTE
TO BE READ
RXAK=0
Y
TX/RX
TX
N
Y (READ)
N
SRW= 1
WRITE NEXT
GENERATE
STOP SIGNAL
SET TXAK = 1
READ SMDR
AND STORE
BYTE TO SMDR
N (WRITE)
SET
TX MODE
GENERATE
STOP SIGNAL
Y
ACK FROM
RECEIVER
WRITE
TO SMDR
TX NEXT
BYTE
N
SET
RX MODE
SWITCH TO
RX MODE
READ DATA FROM
SMDR AND STORE
DUMMY READ
FROM SMDR
DUMMY READ
FROM SMDR
RTI
Figure 12-5. Flow-chart of SM-Bus Interrupt Routine
MOTOROLA
12-12
SM-BUS
MC68HC05SB7
REV 2.1
FREESCALE [ Freescale ]
