5
Monoshot Operation
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
CRYSTAL
CLK
INT CLK
(DIVBY2)
TXD
INTERNAL
IRTXD
OUTPUT
IRTXD
(MONOSHOT)
6 CRYSTAL CYCLES
The figure above illustrates the
operation of the monoshot when
the internal clock is set to divide
by 2 mode, i.e., when A2=0,
A1=0, and A0=0. A rising edge
on the internal modulation state
machine (IRTXD OUTPUT), will
cause the output on the IRTXD to
go up for 6 crystal clock cycles.
With a 3.6864 MHz clock, this
corresponds to a pulse of 1.63
µs.
The duration of this pulse is
independent of the code A2,
A1,A0 and is always 6 clock
cycles of the crystal, corre-
sponding to the monoshot
operation.
AGILENT [ AGILENT TECHNOLOGIES, LTD. ]
