User`s guide

LZ87010 Advance User’s Guide UARTs
1/15/03 10-5
Figure 10-4. Transmit Operation, Mode 0
LZ87010-95
SCON.TI
TO
INTERRUPT
CONTROLLER
See NOTE
NOTE: Serial data is 8 bits in Mode 0 (no START bit, 8 data bits, no STOP bit).
SCON.SMOD[1:0]
SBUF
INTERNAL TO
THE LZ87010
EXTERNAL TO
THE LZ87010
DONE
CLK
MODE
XMIT
START
TRANSMIT
CONTROL
LOAD
SBUF
WRITE
PCLK
SHIFT
D7 D6 D5 D4 D3 D2 D1
SHIFT DIRECTION
RXD(x)
(Transmit and
Receive Data)
TXD(x)
(Serial
Clock)
D0
TRANSMIT SHIFT
REGISTER
TXD(x) CLK
OUTPUT
RXD(x)
OUTPUT
SBUF
WRITE
D0 D1 D2 D3 D4 D5 D6 D7
MODE 0 TRANSMIT TIMING