EM78815
8-Bit Microcontroller
Bit 0 ~ Bit 7 (P90 ~ P97) : 8-bit Port 9 ( 0~7 ) I/O data register
User can use the IOC register to define each bit either as input or output.
7.2.15.2 Page 1 Data ROM Address
Bit 7
Bit 6
Bit 5
Bit 4
DRA20
R/W-X
Bit 3
DRA19
R/W-X
Bit 2
DRA18
R/W-X
Bit 1
DRA17
R/W-X
Bit 0
DRA16
R/W-X
-
-
-
-
-
-
Bit 0 ~ Bit 4 (DRA16 ~ DRA20) : Data ROM address (16~20) for ROM reading..
Bit 5~Bit 7 : Unused
7.2.15.3 Page 2 FSK/CW/DTMF Power Select
Bit 7
PCTRL1 PCTRL0
R/W-0 R/W-0
Bit 6
Bit 5
ADCS3
R/W-0
Bit 4
ADCS2
R/W-0
Bit 3
ADCS1
R/W-0
Bit 2
Bit 1
Bit 0
-
-
-
-
-
-
Bit 0 ~ Bit 1 : Unused
Bit 3 ~ Bit 5(ADCS1 ~ ADCS3) : PORT65 ~ Port 67 normal IO / CMP input control
bit.
ADCSX = 1 → Comparator input
ADCSX = 0 → Normal IO
Bit 6~Bit 7 (PCTRL0~PCTRL1) : FSK and DTMF power control bits
PCTRL1
PCTRL0
Select
FSK and DTMFr power off
FSK power on
Relation Register
0
0
1
1
0
1
0
1
-
RA Page 0
R8 Page 2
-
DTMF receiver power on
Cannot be used
* Do not set both the bits to 1, or FSK and DTMF function will fail.
* When User turns on the DTMF receiver power, Port 60 and Port 61 will switch to
/STGT and EST pin.
7.2.15.4 Page 3 Keytone Control
Bit 7
URT8
R/W-X
Bit 6
URR8
R
Bit 5
DA1
Bit 4
DA0
Bit 3
URINV
R/W-X
Bit 2
KT1
Bit 1
KT0
Bit 0
KTS
R/W-X
R/W-X
R/W-0
R/W-0
R/W-0
Bit 0 (KTS) : Key tone output switch
0 → Normal Port 76
1 → Keytone output
32 •
Product Specification (V2.4) 02.17.2006
(This specification is subject to change without further notice)
ELAN [ ELAN MICROELECTRONICS CORP ]
