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

Continued from preceding page.

Symbol R/W

Function

Stack pointer

The stack consists of eight 14-bit registers and thus can be set to a depth of up to eight levels.

The stack pointer is incremented by CALL instructions and interrupts, and decremented by RTS, RTSR and POP

instructions.

Initialization

value at reset

STACK R/W

01H

P0 to P11: Program counter (PC)

DPF:

Data pointer flag

Bank register

The bank register is a 4-bit register that divides RAM (from 00H to FFH) into 16 sections and is used in moving RAM

data, immediate operations and setting the data pointer.

BNK

R/W

00H

Example: ADD*_5,10.....If BNK is 6 then the operation performed will be: RAM(65H) + 10 → AC → RAM(65H).

RAM page flags

APG

R/W

The RAM page flags consist of 2 bits that allow RAM to be expanded in 256 4-bit pages to a total of 1024 4-bit

locations.

00H

Note: Pages 2 and 3 cannot be used by the LC587004, LC587006 and LC587008.

Timer counters

The timers consist of 8-bit down counters. (timer 1 and timer 2)

Timer setting is performed in 8-bit units for immediate data. (timer 1 and timer 2)

Reading and writing the lower 4 bits of a timer counter is performed through a RAM location. (timer 2 only)

Reading and writing the upper 4 bits of a timer counter is performed using the B register. (timer 2 only)

TIM

TIM1 R/W

TIM2

Undefined

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No. 4435-17/29

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