scc2681 NXP Semiconductors, scc2681 Datasheet - Page 25

• Manufacturer Part Number: scc2681
• Description: Dual Asynchronous Receiver/transmitter Duart
• Manufacturer: NXP Semiconductors

Philips Semiconductors
TIMING DIAGRAMS
2004 Apr 06
Dual asynchronous receiver/transmitter (DUART)
TRANSMITTER
NOTES:
1. Timing shown for MR1(7) = 1.
2. Shown for OPCR(4) = 1 and MR(6) = 0.
RECEIVER
ENABLED
ENABLED
RDN/WRN
RxRDY
TxRDY
(SR2)
(SR0)
RECEIVER
WRN
OVERRUN
ENABLED
RxD
TxD
RxRDY/
RxRDY
FFULL
FFULL
(OP5)
(OP0)
MR1(4–3) = 11
(SR0)
(SR1)
(SR4)
RTS
RDN
RxD
MASTER STATION
PERIPHERAL STATION
MR1(4–3) = 11
MR1(2) = 1
2
1
(Continued)
OPR(0) = 1
ADD#1 MR1(2) = 0 D0
BIT 9
0
D1
STATUS DATA
ADD#1
ADD#1 1
D1
BIT 9
1
D2
BIT 9
ADD#1
Figure 11. Receiver Timing
Figure 12. Wake-Up Mode
D0
D0
D3
BIT 9
0
BIT 9
0
25
STATUS DATA
D4
D0
D5 WILL
BE LOST
MR1(2) = 1 ADD#2
D5
STATUS DATA
D2
D6
STATUS DATA
D3
D6, D7, D8 WILL BE LOST
ADD#2 1
ADD#2 1
D7
STATUS DATA
BIT 9
D4
BIT 9
RESET BY COMMAND
SCC2681
STATUS DATA
D8
ADD#2
SD00095
Product data
BIT 9
0
SD00096