em78p811 ELAN Microelectronics Corp, em78p811 Datasheet - Page 12

• Manufacturer Part Number: em78p811
• Description: 8-bit Micro-controller
• Manufacturer: ELAN Microelectronics Corp

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* This specification is subject to be changed without notice.
6. R5 (Program Page Select Register)
6. R6 ~ R9 (Port 6 ~ Port 9)
7. RA (FSK Status Register)(bit 0,1,2,4 read only)
5. R4 (RAM Select Register)
* Bit 5 unused
* Bit 6 PAGE : change IOCB ~ IOCE to another page , 0/1 => page0 / page1
* Bit 7 unused
* Bits 0 ~ 5 are used to select up to 64 registers in the indirect addressing mode.
* Bits 6 ~ 7 determine which bank is activated among the 4 banks.
* See the configuration of the data memory in Fig. 5.
* Bit 0 (PS0) ~ 3 (PS3) Page select bits
Page select bits
*User can use PAGE instruction to change page. To maintain program page by user. Otherwise, user can use far
*Bit4~7 : unused
* Five 8-bit I/O registers.
7
-
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.
PS3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
6
-
power up
Low pulse on /RESET
PS2
5
-
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
4
-
PS1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
3
PS3
PS0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
2
PS2
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
PS1
1
1
x
11
0
PS0
1
x
x .. don't care
8-bit OTP Micro-controller
EM78P811