User's Manual

INTERNAL SPECIFICATIONS
123
D1
WRITE TO SBUF TXD TERMINATE TRANSMISSION TX CLOCK TI
D2 D3 D4 D5 D6
RX COUNTER RUN RXD SAMPLE CLOCK LOAD SBUF RXD SHIFT-IN CLOCK RI or SERR SET TERMINATE RECEPTION
STOP BIT
STOP BIT
M1·S3
TBBD0
D1 D2 D3 D4 D5 D6 RBBD0
M1·S3
START BIT
START BIT
D7
D7
Figure 4-36 Serial port (mode 3) timing chart