COM20051 Datasheet, PDF (62/82 Pages) List of Unclassifed Manufacturers – Integrated Microcontroller and ARCNET (ANSI 878.1) Interface

CLEAR INT. (MASK
OFF FOR
NON-CHAINING)
S TA R T
READ ARCNET
STATUS REG.
Y
TMA SET?
N
CLEAR TX INT
(MASK OFF FOR
NON-CHAINING)
READ
TX_PEND_REG
CLEAR BIT 5
N
BIT 6 SET?
Y
CLEAR BIT 6
3
STORE TX_PEND
SET BIT 6 AND
STORE TX_PEND
SET LAST_TX =
TX_OFFSET
N
BIT 5 OF
TX_PEND
SET?
Y
SEND ENABLE TO
TRANSMIIT CMD.
N
CMD CHAIN
ENABLED?
UNMASK
INTERRUPT
EXIT
FIGURE 19 – TRANSMIT INTERRUPT SERVICE ROUTINE
62