EM78811 データシートの表示（PDF） - ELAN Microelectronics
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EM78811 Datasheet PDF : 33 Pages
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EM78811
8-BIT MICRO-CONTROLLER FOR TELECOM PRODUCT
R5 (Program Page Select Register)
7
6
5
-
-
-
4
3
2
1
0
-
PS3
PS2
PS1
PS0
• Bir0 (PS0) ~ 3 (PS3) Page select bits
Page selects bits
PS3
PS2
PS1
PS0
0
0
0
0
0
0
0
1
0
0
1
0
0
0
1
1
0
1
0
0
0
1
0
1
0
1
1
0
0
1
1
1
1
1
1
1
1
1
1
1
:
:
:
;
1
1
1
1
Program memory page (Address)
Page 0 ( 0000 - 03FF )
Page 1 ( 0400 - 07FF )
Page 2 ( 0800 - 0BFF )
Page 3 ( 0C00 - 0FFF )
Page 4 (1000 - 13FF )
Page 5 ( 1400 - 17FF )
Page 6 ( 1800 - 1BFF )
Page 7 ( 1C00 - 1FFF )
Page 8 ( 2000 - 23FF)
Page 9 (2400 - 27FF)
:
Page 15 (3C00 - 3FFF)
• User can use PAGE instruction to change page. To maintain program page by user. Otherwise, user can use
far jump (FJMP) or far call (FCALL) instructions to program user's code. And the program page is maintained
by EMC's complier. It will change user's program by inserting instructions within program.
• Bit4~7 : unused
R6 ~ R9 (Port 6 ~ Port 9)
• Five 8-bit I/O registers.
RA (FSK Status Register)(bit0,1,2,4 read only))
7
IDLE
6
5
4
3
2
1
0
/358E /LPD /LOW-BAT /FSKPWR DATA /CD /RD
• Bit0 (Read Only) (Ring detect signal)
0/1 : Ring Valid/Ring Invalid
• Bit1(Read Only)(Carrier detect signal)
0/1 : Carrier Valid/Carrier Invalid
• Bit2(Read Only)(FSK demodulator output signal)
Fsk data transmitted in a baud rate 1200 Hz. Data from FSK demodulator when /CD is Low.
• Bit3(read/write)(FSK block power up signal)
1/0 : FSK demodulator block power up/FSK demodulator power down
The relation between Bit0 to Bit3 is shown in Fig.6.
* This specification are subject to be changed without notice.
10.12.1998 7
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