MC68HC58 Motorola, MC68HC58 Datasheet - Page 63

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

MC68HC58
TECHNICAL DATA
YES
REGISTER, INITIATING SPI TRANSFER
LOAD “FLUSH BYTE” COMMAND BYTE
RETRIEVE COMPLETION CODE FROM
BIT COMBINATION INTO SPI DATA
IS SPI TRANSFER COMPLETE?
Figure 4-12 Host/DLC Serial Mode Receive Routine (Part 2 of 2)
DOES COMPLETION CODE
DISCARD MESSAGE DATA
DOES COMPLETION CODE
INDICATE VALID DATA?
INDICATE MORE DATA?
END RX DATA ROUTINE
SPI DATA REGISTER
NEGATE DLC CS
NO
C
YES
NO
DATA LINK CONTROLLER OPERATION
YES
NO
F
B
LOAD “FLUSH MESSAGE” COMMAND
LOAD DUMMY DATA BYTE INTO SPI
NEGATION AND ASSERTION OF CS
MINIMUM 2.5 S DELAY BETWEEN
BYTE BIT COMBINATION INTO SPI
DATA REGISTER, INITIATING SPI
DATA REGISTER, INITIATING SPI
IS SPI TRANSFER COMPLETE?
IS SPI TRANSFER COMPLETE?
ASSERT DLC CS
NEGATE DLC CS
TRANSFER
TRANSFER
E
D
YES
YES
NO
NO
LOAD “FLUSH BYTE” COMMAND BYTE
REGISTER, INITIATING SPI TRANSFER
LOAD DUMMY DATA BYTE INTO SPI
BIT COMBINATION INTO SPI DATA
DATA REGISTER, INITIATING SPI
IS SPI TRANSFER COMPLETE?
IS SPI TRANSFER COMPLETE?
RETRIEVE COMPLETION CODE
FROM SPI DATA REGISTER
ASSERT DLC CS
NEGATE DLC CS
TRANSFER
E
F
YES
YES
MOTOROLA
DLC HOST REC FLOW 2
4-19
NO
NO