E0C5250
BT Idle State CLI service
Line Reversal
INP/INN
#RDRC
#IRQ
Alert signal
FSK
data transfer
1st RING
Power-down due to timeout
PDWN
MODE
#DET
SDI
SDO
Serial clock
Power-down after receiving last data
CAS/write mode
FSK/read mode
Ring detection
Carrier detection
Line Reversal detection CAS tone detection
Control data bits written
Receive data
Serial clock
#SCLK
OSC4
BT Loop State CLI service
TE→Off-hook
TE→Receiver muted
TE→Receiver muting released
INP/INN
#RDRC
#IRQ
PDWN
MODE
#DET
SDI
SDO
Alert signal
ACK
FSK data transfer
DTMF D transmitted from TE
Power-on state maintained when
receiver is off-hook to detect CAS tone
CAS/write mode
CAS tone detection
Control data bits written
Placed in CAS mode
after receiving last data
FSK/read mode
Carrier detection
FSK mode must be set to prevent failure in carrier detection after sending ACK
Receive data
Serial clock
Serial clock
#SCLK
OSC4
10
SEIKO [ SEIKO EPSON CORPORATION ]
