Radio Shack TRS-80 PT-210 Service Manual page 37

Figure 28. Timing Chart
-
RTS
(Request to Send)
1-1 300BPS
RD., SD
(Odd, Even Parity)
'
1 Bit
DATA bit (7 Bits)
1
Spacep,
;
I
-START Bit
1
LSTOP
Bit
-Parity Bit: Odd. Even
Mark
100 mS
Mark
- -
RD., SD
(Odd, Even Parity)
-
START Bit
"Parity
Bit:
Odd, Even
Mark
I
I
!
(NON-Parity)
DATA Bit (7 Bits)
I
(
' S T O P
Bit
+
-START Bit
-NO"-parity Bit
-
CTS
(Clear to Send)
L
-
-
DTR
(Data Terminal Ready)
I
i-7
space
I
(Data Set Ready)
1 Bit DATA Bit (7 Bits)
1
Bit 1 Bit
START Bit
i