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Philips Semiconductors Product data sheet
SC28L91
3.3 V or 5.0 V Universal Asynchronous
Receiver/Transmitter (UART)
2004 Oct 21
37
t
TXD
t
TCS
1 BIT TIME
(1 OR 16 CLOCKS)
TxD
TxC
(INPUT)
TxC
(1X OUTPUT)
SD00138
Figure 12. Transmitter External Clocks
t
RXS
t
RXH
RxC
(1X INPUT)
RxD
SD00139
Figure 13. Receiver External Clock
TRANSMITTER
ENABLED
TxD D1 D2 D3 D4 D6BREAK
TxRDY
(SR2)
WRN
D1 D8 D9 D10 D12START
BREAK
STOP
BREAK
D11 WILL
NOT BE
WRITTEN TO
THE TxFIFO
CTSN
1
(IP0)
RTSN
2
(OP0)
OPR(0) = 1 OPR(0) = 1
NOTES:
1. Timing shown for MR2[4] = 1.
2. Timing shown for MR2[5] = 1.
SD00155
Figure 14. Transmitter Timing