LC587004 Ver la hoja de datos (PDF) - SANYO -> Panasonic

Número de pieza

componentes Descripción

Fabricante

LC587004

Single-Chip 4-Bit Microprocessors with LCD Driver, 2 Kb RAM, and 8, 12, or 16 KB ROM on chip

SANYO -> Panasonic 

LC587008, 587006, 587004

Internal Register Functions

Symbol R/W

Function

Initialization

value at reset

Program counter

The PC is a 13-bit counter that indicates the address in program memory (ROM) of the next instruction to execute.

Normally the PC is incremented on every instruction cycle in the range 000H to 1F7FH. (Addresses in the range 1F80

to 1FFF are reserved for testing and cannot be used by user programs.) However, data values are loaded into the PC

by the execution of branch and subroutine instructions and on the occurrence of interrupts or an initial reset. The table

below describes the data loaded for these operations.

Operation

PC

PC12 PC11 PC10 PC9 PC8 PC7 PC6 PC5 PC4 PC3 PC2 PC1 PC0

Initializing reset

0 00 0 0 0 00 0 0 0 0 0

INT pin external interrupt

0 00 0 0 0 01 0 0 0 0 0

S/K pin external interrupt

0 00 0 0 0 01 0 1 0 0 0

Timer 1 or timer 2 internal

PC

—

interrupt

0 00 0 0 0 01 1 0 0 0 0

Serial counter internal interrupt

or SO4 pin external interrupt

0 00 0 0 0 01 1 1 0 0 0

Unconditional jump (JMP)

Page P10 P9 P8 P7 P6 P5 P4 P3 P2 P1 P0

Conditional jump

(BAB0, BAB1, BAB2, BAB3,

BAZ, BANZ, BCH, BCNH)

Page P10 P9 P8 P7 P6 P5 P4 P3 P2 P1 P0

Call instruction (CALL)

Page P10 P9 P8 P7 P6 P5 P4 P3 P2 P1 P0

Return instruction (RTS, RTSR) CALL address + 1

Page:

the ROM page flags, which take 2048 locations as a single page

The page is specified with the MROPF and SROPF instructions.

P00 to P10: Bits in the instruction code (i.e., immediate data)

Program memory

The ROM memory consists of 4096 x 16 bits (4 kwords or 8 kbytes) in the LC587004, 6144 x 16 bits (6 kwords or 12

kbytes) in the LC587006 and 8064 x 16 bits (8 kwords or 16 kbytes) in the LC587008. ROM hold user programs to be

executed.

ROM

R/O

RAM

Data memory

These microprocessors provide an on-chip RAM that consists of 512 × 4 bits (2 Kb). This RAM is accessed as two

256 × 4-bit pages.

RAM addresses can be specified in four ways as listed below.

R/W

• Directly specified at 00H to FFH (immediate addressing)

• Indirect specification using the 8-bit data pointer.

• Indirect specification by the 4-bit RAM bank register multiplied by 10H plus immediate data in the range 0 to FH.

• Indirect specification by the 4-bit RAM bank register multiplied by 10H plus 8H plus immediate data in the range 0 to

FH.

Writing to RAM is always performed through the accumulator.

Undefined

Continued on next page.

No. 4435-15/29

Share Link: