EM78815
8-Bit Microcontroller
Tone 1 (IOCC Page 1) or
Tone 2 (IOCD Page 1)
Freq. (Hz)
Description
1201.4
2187.2
1292.4
2080.5
Bell202 FSK Mark bit
Bell202 FSK Space bit
V.23 FSK Mark bit
0×47
0×27
0×42
0×29
V.23 FSK Space bit
The Tone generator can also generate CW or SMS signal. See the following table.
Tone 1 (IOCC Page 1) or
Tone 2 (IOCD Page 1)
Freq. (Hz)
Description
2132.5
2751.6
CAS freq
CAS freq
0×28
0×1F
7.2.17 RB Port B I/O Data, Key Strobe, Tone 2 Generator
7.2.17.1 Page 0 Port B I/O Data
Bit 7
PB7
Bit 6
PB6
Bit 5
PB5
Bit 4
PB4
Bit 3
PB3
Bit 2
PB2
Bit 1
PB1
Bit 0
PB0
R/W-X
R/W-X
R/W-X
R/W-X
R/W-X
R/W-X
R/W-X
R/W-X
Bit 0 ~ Bit 7 (PB0 ~ PB7) : 8-bit Port B ( 0~7 ) I/O data register.
User can use the IOC register to define each bit as either input or output.
7.2.17.2 Page 1 Undefined Register: This register is not for use.
7.2.17.3 Page 2 Key Strobe Control Register
Bit 7
STRB7
R
Bit 6
STRB6
R
Bit 5
STRB5
R
Bit 4
STRB4
R
Bit 3
STRB3
R
Bit 2
STRB2
R
Bit 1
STRB1
R
Bit 0
STRB0
R
Bit 0 ~ Bit 7 (STRB0 ~ STRB7) : Key strobe control bits.
These key strobe control registers correspond to Port 80 ~ Port 87. Refer to
Keystobe explanation (RE Page 3).
7.2.17.4 Page 3 Tone 2 Control Register
Bit 7
T27
Bit 6
T26
Bit 5
T25
Bit 4
T24
Bit 3
T23
Bit 2
T22
Bit 1
T21
Bit 0
T20
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
Bit 0~Bit 7(T20~T27) : Tone Generator 1 frequency divider and power control. Refer
to RA Page 3 Tone 1 control register for details.
40 •
Product Specification (V2.4) 02.17.2006
(This specification is subject to change without further notice)
ELAN [ ELAN MICROELECTRONICS CORP ]
