scn68652 NXP Semiconductors, scn68652 Datasheet - Page 10

• Manufacturer Part Number: scn68652
• Description: Multi-protocol Communications Controller Mpcc
• Manufacturer: NXP Semiconductors

Philips Semiconductors
1995 May 01
Multi-protocol communications controller (MPCC)
(PROCESSOR SHOULD
NOTES:
1. Test made every RxC time.
2. Test made on Rx character boundary.
READ AND EXAMINE
CHARACTER HAS
RDSR
BEEN SERVICED
S/F = 1 FOR ONE
SHOULD READ
RERR (IF VRC
(PROCESSOR
RxC BIT TIME
WHEN LAST
H
SPECIFIED)
PROCESSOR
– ROVRN,
RxSA = 1
RxDA = 1
RxA = 1
RxE = 0
RxE = 1
RxDB)
SPECIFIED, ACCUMULATE
Figure 7. BCP Receive
ASSEMBLE CHARACTER
INITIALIZE PCSAR, PCR
IN RxSR, STRIP VRC IF
CRC IF SPECIFIED
RxSR
STATUS BIT
YES
YES
YES
DETECT IN
RECEIVER
IN CCSR?
IN CCSR?
DETECT
DETECT
CCSR?
SYNC
0
SYNC
SYNC
ANY
RxE
= 1?
RxE
= 0?
?
A
10
RxDB
NO
YES
1
YES
1
2
NO
YES
NO
NO
NO
NO
SYNC (PCSAR
(1) SYNCs ARE ASSEMBLED
(2) OVERRUN (ROVRN) CAUSES
A
LOSS OF SUBSEQUENT
CHARACTERS
STRIP
= 1?
NO
SCN2652/SCN68652
13
)
YES
SD00062
Product specification