Philips SCC2691 Product Data Sheet page 18

Philips Semiconductors
Universal asynchronous receiver/transmitter (UART)
TxD D1
TRANS-
MITTER
ENABLED
TxRDY
(SR2)
WRN
D1 D2
1
CTSN
(MPI)
2
RTSN
(MPO)
CR[7:4] = 1010
NOTES:
1. TIMING SHOWN FOR MR2[4] = 1.
2. TIMING SHOWN FOR MR2[5] = 1.
RxD D1
RECEIVER
ENABLED
RxRDY
(SR0)
D2
FFULL
(SR1)
RxRDY/
FFULL
2
MPO
RDN
S
OVERRRUN
(SR4)
1
RTS
MPO
MPO = 1 (CR[7:4] = 1010)
NOTES;
1. Timing shown for MR1[7].
2. Shown for ACR[2:] = 111 and MR1[6] = 0.
2006 Aug 04
D2
D3 START
BREAK
Figure 10. Transmitter Timing
D2 D3
S = STATUS
D = DATA
D
D1
Figure 11. Receiver Timing
D3 BREAK D4
D4 STOP
BREAK
TRANSMITTED
D4 D5
D5 WILL
BE LOST
18
Product data sheet
SCC2691
D6
D5 WILL D6
NOT BE
CR[7:4] = 1010
D6 D7
S D
S D S D
D2
D3 D4
RESET BY
COMMAND
SD00129
SD00128
D8