Philips SCC2691 - Manual (Page 18)

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