MC68HC58 Motorola, MC68HC58 Datasheet - Page 59

• Manufacturer Part Number: MC68HC58
• Description: Data Link Controller
• Manufacturer: Motorola

MC68HC58
TECHNICAL DATA
FROM THE DLC FROM SPI DATA REGISTER
TRANSMITTED INTO SPI DATA REGISTER,
RETRIEVE THE STATUS BYTE RECEIVED
LOAD LAST BYTE OF MESSAGE TO BE
NEGATION AND ASSERTION OF CS
MINIMUM 2.5 S DELAY BETWEEN
IS SPI TRANSFER COMPLETE?
INITIATING SPI TRANSFER
ASSERT DLC CS
Figure 4-10 Host/DLC Serial Mode Transmit Routine (Part 2 of 2)
C
D
YES
NO
DATA LINK CONTROLLER OPERATION
DATA” COMMAND BYTE BIT COMBINATION
LOAD “LOAD AS LAST BYTE OF TRANSMIT
INTO SPI DATA REGISTER, INITIATING
ACCESS PROCEDURE IN ORDER TO
DETECTED ON THE J1850 BUS, THE
DLC WILL BEGIN NECESSARY BUS
ONCE AN IDLE BUS CONDITION IS
IS SPI TRANSFER COMPLETE?
END TX DATA ROUTINE
TRANSMIT MESSAGE
IS TX FIFO STATUS
NEGATE DLC CS
SPI TRANSFER
CORRECT?
D
YES
YES
NO
NO
ABORT TRANSMISSION, IF APPROPRIATE,
DETERMINE REASON FOR INCORRECT
TO RESET DLC TRANSMITTER
DLC TX FIFO STATUS
NEGATE DLC CS
E
DLC HOST TRANS FLOW 2
MOTOROLA
4-15