EM78815
8-Bit Microcontroller
Bit 3(CW_SMB) : Call Waiting / short message receiver switch
0 → Short message mode select ± 5.5% CAS tone accepted
frequency range deviation. (Protocol: ± 5%)
1 → Call Waiting mode select ± 2.0% CAS tone accepted
frequency range deviation.
Bit 4 (WUEDD) : Wake-up control for the Energy Detector (DED) output data
1/0 → enable/disable
Bit 5 (EDGE) :
Wake-up and interrupt trigging edge control of the Energy Detector
(DED) output
1/0 → Rising edge and Falling edge trigger / Falling edge trigger
Bit 6(DEDD) :
Output data for Differential Energy Detector (DED). If the input
signal from TIP/EGIN1 and RING/EGIN2 pins to Differential Energy
Detector is over the threshold level setting at IOCE Page 2 Bit 0
(DEDTHD), the DED will extract the zero-crossing pulse waveform
corresponding to the input signal.
Bit 7 (VRSEL) : Reference voltage VR selection bit for Comparator
0 → VR = VDD
1 → VR = 2.0V
When this bit is set to “0”, V2_0 reference circuit will be powered off. The 2.0V
reference circuit is only powered on when this bit and RA Page 2 bit 7 (CMPEN) are
all set to “1”.
7.3.13 IOCF Interrupt Mask Register 2
Bit 7
Bit 6
Bit 5
Bit 4
UART
R/W-0
Bit 3
DED
Bit 2
CNT2
R/W-0
Bit 1
CNT1
R/W-0
Bit 0
TCC
RBF/STD FSK/CW
−
×
R/W-0
R/W-0
R/W-0
R/W-0
Bit 0~Bit 7 :
Interrupt enable bits
0/1 → Disable interrupt/enable interrupt
58 •
Product Specification (V2.4) 02.17.2006
(This specification is subject to change without further notice)
ELAN [ ELAN MICROELECTRONICS CORP ]
