Gemalto M2M GmbH MC56 User Manual
MC55/56 Hardware Interface Description
Confidential / Preliminary
Confidential / Preliminary
s
MC55/56_hd_v03.00
Page 48 of 104
16.08.2005
3.6.6.1
Wake-up via /RTS0 and RTS1 (if AT+CFUN=0 or AT+CFUN=9)
During the CYCLIC SLEEP modes 5, 6, 7, and 8, the /RTS0 and /RTS1 lines are
conventionally used for flow control: The assertion of /RTS0 or /RTS1 indicates that the
application is ready to receive data - without waking up the module.
If the module is in CFUN=0 mode the assertion of /RTS0 and /RTS1 serves as a wake-up
event, giving the application the possibility to intentionally terminate power saving. If the
module is in CFUN=9 mode, the assertion of /RTS0 or /RTS1 can be used to temporarily
wake up MC55/56 for the time specified with the AT^SCFG command (default = 2s). In both
cases, if /RTS0 or /RTS1 is asserted while AT+CFUN=0 or AT+CFUN=9 is set, there may be
a short delay until the module is able to receive data again. This delay depends on the
current module activities (e.g. paging cycle) and may be up to 60ms. The ability to receive
data is signalized by /CTS0 and /CTS1. It is therefore recommended to enable RTS/CTS
flow control, not only in CYCLIC SLEEP mode, but also in NON-CYCLIC SLEEP mode.
conventionally used for flow control: The assertion of /RTS0 or /RTS1 indicates that the
application is ready to receive data - without waking up the module.
If the module is in CFUN=0 mode the assertion of /RTS0 and /RTS1 serves as a wake-up
event, giving the application the possibility to intentionally terminate power saving. If the
module is in CFUN=9 mode, the assertion of /RTS0 or /RTS1 can be used to temporarily
wake up MC55/56 for the time specified with the AT^SCFG command (default = 2s). In both
cases, if /RTS0 or /RTS1 is asserted while AT+CFUN=0 or AT+CFUN=9 is set, there may be
a short delay until the module is able to receive data again. This delay depends on the
current module activities (e.g. paging cycle) and may be up to 60ms. The ability to receive
data is signalized by /CTS0 and /CTS1. It is therefore recommended to enable RTS/CTS
flow control, not only in CYCLIC SLEEP mode, but also in NON-CYCLIC SLEEP mode.