em78p862a ELAN Microelectronics Corp, em78p862a Datasheet - Page 3

• Manufacturer Part Number: em78p862a
• Description: 8-bit Risc Type Microprocessor
• Manufacturer: ELAN Microelectronics Corp

Contents
EM78862B Specification
1
2
3
4
5
6
General Description................................................................................................ 1
Features ................................................................................................................... 1
2.1
2.2
Applications ............................................................................................................ 2
Pin Configurations.................................................................................................. 2
4.1
Functional Block Diagram ..................................................................................... 4
Functional Descriptions......................................................................................... 5
6.1
6.2
CPU............................................................................................................................. 1
LCD............................................................................................................................. 2
Pin Description.......................................................................................................... 3
Operational Registers............................................................................................... 5
Special Purpose Registers..................................................................................... 11
6.1.1
6.1.2
6.1.3
6.1.4
6.1.5
6.1.6
6.1.7
6.1.8
6.1.9
6.1.10 R9 (Port 9).................................................................................................................. 8
6.1.11 RA (Mode Control Register) ....................................................................................... 8
6.1.12 RB (Reserved)............................................................................................................ 9
6.1.13 RC (2K RAM Address)................................................................................................ 9
6.1.14 RD (2K RAM Data) ..................................................................................................... 9
6.1.15 RE (LCD Driver, WDT Control) ................................................................................... 9
6.1.16 RF (Interrupt Status Register)....................................................................................11
6.1.17 R10 ~ R1F and R20 ~ R3F (General Purpose Register) ...........................................11
6.2.1
6.2.2
6.2.3
6.2.4
6.2.5
6.2.6
6.2.7
R0 (Indirect Address Register) ................................................................................... 5
R1 (TCC).................................................................................................................... 5
R2 (Program Counter) ................................................................................................ 5
R3 (Status Register) ................................................................................................... 6
R4 (Register Bank Select Register)............................................................................ 7
R5 (Program Page Select Register) ........................................................................... 7
R6 (Port 6).................................................................................................................. 7
R7 (Port 7).................................................................................................................. 7
R8 (Port 8).................................................................................................................. 8
A (Accumulator, ACC)................................................................................................11
CONT (Control Register) ...........................................................................................11
IOC5 (Port 5 I/O Control Register)............................................................................ 12
IOC6 (Port 6 I/O Control Register)............................................................................ 12
IOC7 (Port 7 I/O Control Register)............................................................................ 13
IOC8 (Port 8 I/O Control Register)............................................................................ 13
IOC9 (Port 9 I/O Control Register)............................................................................ 13
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