AN1212 Freescale Semiconductor / Motorola, AN1212 Datasheet - Page 9

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

MOTOROLA
RTS/INT
STX/CS
SDO
SCK
CTS
BSY
SDI
CE
MODE1
INTERFACE
SERIAL
OSC2
MCU
MODE0
J1850 Multiplex Bus Communication Using the MC68HC705C8
and the SC371016 J1850 Communications Interface (JCI)
The JCI is a CMOS device which can operate over a wide temperature range.
It requires a 4 MHz or 8 MHz external oscillator, depending upon the desired
transmission bit rate, which can be supplied by a ceramic resonator.
shows a block diagram of the JCI. The following is a description of all major
hardware features and functions of the JCI.
8
OSC1
Freescale Semiconductor, Inc.
8
For More Information On This Product,
Figure 6. JCI Block Diagram
11 BYTES
11 BYTES
FIFO CONTROL/
11 BYTES
Rx FIFO2
Rx FIF01
Tx FIFO
PROTOCOL
Go to: www.freescale.com
HANDLER
RESET
FLUSH
GENERATION/
VERIFICATION
AMR
ACR
CRC
V
DD
V
SS
ID7
ID6 ID4
I.D. REGISTER
ID5
GENERATION/
RECOGNITION
SYMBOL
DIGITAL
FILTER
ID3 ID1
ID2 ID0
JCI OVERVIEW
Figure 6
AN1212/D
RxJ
COMSEL
TxJ
IFR
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