scn2681t NXP Semiconductors, scn2681t Datasheet - Page 12

• Manufacturer Part Number: scn2681t
• Description: Dual Asynchronous Receiver/transmitter Duart
• Manufacturer: NXP Semiconductors

Philips Semiconductors
2004 Mar 22
Dual asynchronous receiver/transmitter (DUART)
NOTES:
1. Timing shown for MR1(7) = 1.
2. Shown for OPCR(4) = 1 and MR1(6) = 0.
TRANSMITTER
RECEIVER
OVERRUN
RECEIVER
ENABLED
ENABLED
ENABLED
RDN/WRN
RxRDY/
RxRDY
FFULL
FFULL
RxRDY
(OP5)
TxRDY
(OP0)
(SR0)
(SR1)
(SR4)
WRN
RTS
(SR2)
(SR0)
RDN
RxD
RxD
TxD
MR1(4–3) = 11
2
1
MR1(4–3) = 11
MASTER STATION
PERIPHERAL STATION
MR1(2) = 1
OPR(0) = 1
BIT 9
ADD#1 MR1(2) = 0 D0
0
D1
ADD#1
S
ADD#1 1
D1
BIT 9
D
1
D2
BIT 9
S = STATUS
D = DATA
Figure 11. Receiver Timing
Figure 12. Wake-Up Mode
ADD#1
D0
D0
D3
BIT 9
0
BIT 9
0
12
D4
S
MR1(2) = 1
D0
D
D5 WILL
BE LOST
D5
ADD#2
S = STATUS
D = DATA
S
D2
D
D6
ADD#2 1
S D
D6, D7, D8 WILL BE LOST
ADD#2 1
D3
BIT 9
S D
BIT 9
D7
D4
S
RESET BY
COMMAND
ADD#2
SCN2681T
SD00105
D8
D
BIT 9
0
SD00106
Product data