MC68HC908AS60MFN MOTOROLA [Motorola, Inc], MC68HC908AS60MFN Datasheet - Page 352
MC68HC908AS60MFN
Manufacturer Part Number
MC68HC908AS60MFN
Description
HCMOS Microcontroller Unit
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC908AS60MFN.pdf
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Byte Data Link Controller-Digital (BDLC-D)
21.6.1 Protocol Architecture
21.6.2 Rx and Tx Shift Registers
Technical Data
352
The protocol handler contains the state machine, Rx shadow register, Tx
shadow register, Rx shift register, Tx shift register, and loopback
multiplexer as shown in
The Rx shift register gathers received serial data bits from the J1850 bus
and makes them available in parallel form to the Rx shadow register. The
Tx shift register takes data, in parallel form, from the Tx shadow register
and presents it serially to the state machine so that it can be transmitted
onto the J1850 bus.
Freescale Semiconductor, Inc.
DLOOP FROM BCR2
LOOPBACK CONTROL
For More Information On This Product,
Byte Data Link Controller-Digital (BDLC-D)
Figure 21-14. BDLC Protocol Handler Outline
Go to: www.freescale.com
Rx SHADOW REGISTER
Rx SHIFT REGISTER
Figure
BDRxD
MULTIPLEXER
LOOPBACK
TO CPU INTERFACE AND Rx/Tx BUFFERS
8
21-14.
TO PHYSICAL INTERFACE
STATE MACHINE
BDTxD
MC68HC908AS60 — Rev. 1.0
Tx SHADOW REGISTER
Tx SHIFT REGISTER
8
MOTOROLA
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