AN1212 Freescale Semiconductor / Motorola, AN1212 Datasheet - Page 29

• Manufacturer Part Number: AN1212
• Description: J1850 Multiplex Bus Communication Using the MC68HC705C8 and the SC371016 J1850 Communications Interface (JCI)
• Manufacturer: Freescale Semiconductor / Motorola

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MOTOROLA
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J1850 Multiplex Bus Communication Using the MC68HC705C8
and the SC371016 J1850 Communications Interface (JCI)
*** SPSR Bit Assignments ***
spif
wcol
modf
*** JCI Control Bit Assignments ***
rst
cs
*** Port D Bit Assignments ***
ss
sck
mosi
miso
*** Transmit Control Bit Assignments ***
txt
txi
*** General Equates ***
ram
rom
service
timer
vectors
option
none
*** JCI Command Byte Equates ***
nothing
databyte
lastbyte
maskbyte
idbyte
flshbyte
flshfifo
flshtx
tar
*** JCI Status Byte Bit Assignments ***
busa
busb
busact
tfifoc
tfifob
tfifoa
rfifob
rfifoa
Freescale Semiconductor, Inc.
For More Information On This Product,
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Go to: www.freescale.com
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$0030
$0180
$0300
$0360
$1ff4
$1fdf
$0000
$00
$04
$0C
$10
$18
$02
$03
$E0
$80
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;SPSR, Bit 7 - SPI Data Transfer Flag
;SPSR, Bit 6 - Write Collision
;SPSR, Bit 4 - Mode Fault
;Port C, Bit 1 - Reset*
;Port C, Bit 0 - Chip Select*
;Port D, Bit 5 - Slave Select
;Port D, Bit 4 - Serial Clock
;Port D, Bit 3 - Master Out, Slave In
;Port D, Bit 2 - Master In, Slave Out
;Txcntrl, Bit 7 (Message to Tx status)
;Txcntrl, Bit 6 (Previous Tx Complete status)
;Beginning of user RAM
;Beginning of user ROM
;Beginning of Rx IRQ service routine
;Beginning of Timer IRQ service routine
;Beginning of user vectors
;Option Register Location
;Bogus Location
;"Do Nothing" Command Byte
;"Load as Data Byte" Command Byte
;"Load as Last Byte" Command Byte
;"Load as I.D. Mask Byte" Command Byte
;"Load as I.D.Byte" Command Byte
;"Flush First Byte in FIFO" Command Byte
;"Flush Current FIFO" Command byte
;"Abort Tx and Flush FIFO" Command byte
;"Terminate Auto Retry" Command byte
;Bus Status Bit B
;Bus Status Bit A
;Bus Active Bit
;Tx FIFO Status Bit C
;Tx FIFO Status Bit B
;Tx FIFO Status Bit A
;Rx FIFO Status Bit B
;Rx FIFO Status Bit A
Code Listings
AN1212/D
29