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195
Serial busy protocol (I byte) mode
~;q ~
DB
DTR
Fin 20
u~
u I-J
RCH
u u
1
u
u
Pin I1
1
au f f e r
fu 1 I
or Of f 1 I n.
Serial busy protocol (1 block) mode
RXD
P,” 3
g:~o –
$::, ~
Buffer full
0, off 11”.
XON/XOFF prutacol
RXD
Pin 3
TXD
P,” 2
xOFF (DC31 XOFF IDC31’
XON IDCII
9.f f . . fu I 1 or of f I I n.
ACK protocol
RXD
Pm 3
:::0
TXD
P,” 2
8“ f f e r f u I 1
. . Of
f Itn.
08- Defa Brie
Figure G-2. Serial protocol timing charts.