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Iridium Satellite LLC
9601 SBD Transceiver Preliminary Product Developers Guide Appendix A –AT Command Reference
V1.24 120505
3 S-Register Definitions
S-registers allow control over specific 9601 operations. Some S-registers contain a
single numeric value, other S-registers are bit-mapped where individual bits, or set of
bits, control specific functions.
Table 1 defines the S-registers used for 9601 Transceiver. Many of the 9522A
Transceiver S-registers are obsolete for 9601 Transceiver, and 9601 Transceiver
requires some new S-registers. To prevent reallocation of obsolete S-registers, they
are reserved and shaded out in the table, and the new S-registers are registers that are
unused in 9522A Transceiver a n d a r e ma r k e d a s " new for 9601 Transceiver" .
All S-registers, from S0 to S127, are readable. All write permissions remain unchanged
from 9522A Transceiver, even where a writable register is not used in 9601
Transceiver. Wr i t a b l e r e g i s t e r s a r e h i g h l i g h t e d i n t h e " S r = n w r i t a b l e ? " c o l u mn . A n F A
could use the unused writable S-registers to store application-specific data.
The final column in the table indicates which S-registers are stored in non-volatile
memory as part of a user profile; the 9601 can be reset to a stored profile using the
command.
3.1 S-Register Commands
Commands allow S-registers to be read, written, or simply referenced (i.e. set a pointer
to designate the current, referenced S-register). S-register commands are described in
the following subsections.
3.1.1 Sr –Direct S-Register Reference
Set a pointer to reference S-register
3.1.2 Sr? –Direct S-Register Read
Read the value of S-register
3.1.3 Sr=n –Direct S-Register Write
Set the value of S-register
3.1.4 ? –Referenced S-Register Read
Read the value of the current referenced S-register. The current referenced S-register
is that which was last acted upon by a direct reference (
(
) command.
ATSr=n
3.1.5 =n –Referenced S-Register Write
Set the value of the current referenced S-register to
is that which was last acted upon by a direct reference (
(
) command.
ATSr=n
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.
r
.
r
to
, where
is a decimal value in the range 0 to 255.
r
n
n
r), read (
ATS
ATSr?
. The current referenced S-register
n
), read (
ATSr
ATSr?
Zn
), or write
), or write
59
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