Installation Instruction

Ref : SCT TMO MOD SPEC 662
Rev.: B
Ref. sec. :
Date:
18/11/2004
Document
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MO2XX module – Confidential under NDA
Page 50/67
MOD_FLOW_STATE is inactive when the MO2XX has nothing to send.
MOD_RESET_STATE is active during the the
software
reset procedure,
but it can not be trusted
during hardware reset
.
MOD_OFF*_CMD command the switch off of the MO2XX.
MOD_ON*_CMD command the switch on of the MO2XX.
DTE_UART*_STATE is inactive when the DTE has nothing to send. If MOD_FLOW_STATE is
inactive too, the DTE can switch off its UART.
MOD_RESET*_CMD command the reset of the DCE.
To make an interface with a host, the XS200 power management and hardware multiplexing
signals need to be polarized with pull down or pull up resistors :
Power management inputs :
DTE_UART*_STATE need pull up resistors (100K).
1.3.2. Signals and states.
In these tables as well as in the following chapters, we will consider the
logical levels
(active,
inactive or either) and
not the actual electric
one (high, low ...).
MO2XX modes:
Each state is represented by the combination of MOD_ON_STATE and MOD_UART_STATE
signals.
MOD_ON_STATE
MOD_UART_STATE
MOD_RESET_STATE
OFF Inactive Inactive Inactive
ON Sleep Active Inactive Inactive
ON Active Active Active Inactive
RESET Active Either Active
DTE modes:
The DCE only needs to know if the serial link of the DTE is active or not. It is represented by the
DTE_UART_STATE signal.
DTE_UART_STATE
OFF Inactive
ON Sleep Inactive
ON Active Active