EM78860 View Datasheet(PDF) - ELAN Microelectronics
Part Name
Description
Manufacturer
EM78860 Datasheet PDF : 25 Pages
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EM78860
8-BIT MICRO-CONTROLLER
R4 ( RAM Select Register )
• Bit 0 ~ 5 are used to select up to 64 register in the indirect addressing mode.
• Bit 6 ~ 7 determine which bank is actived among the 4 banks.
• See the configuration of the data memory in Fig.4.
R5 ( Program Page Select Register)
7
6
5
-
-
-
4
3
2
1
0
-
PS3
PS2
PS1
PS0
• Bit 0 (pS0) ~ 3 (PS3) Page selec bits.
Page select 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
0
0
0
1
0
0
1
1
0
1
0
1
0
1
1
1
1
0
0
1
1
0
1
1
1
1
0
1
1
1
1
program memory page (Address)
Page 0
Page 1
Page 2
Page 3
Page 4
page 5
Page 6
Page 7
Page 8
Page 9
Page 10
Page 11
Page 12
Page 13
Page 14
Page 15
• 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 instruction within program.
• Bit4~7 : unused
R6 ~R9 ( Port 6 ~ Port 9)
• Five 8-bit I/O registers.
RA
7
6
5
4
3
2
1
0
IDLE
/358E
/LPD /LOW-BAT
0
0
0
0
• Bit0 ~ Bit3 unused, please set to "0"
* This specification are subject to be changed without notice.
6.24.1998 6
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