EM78P153E Просмотр технического описания (PDF) - ELAN Microelectronics

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EM78P153E

8-bit microprocessor designed and developed with low-power and high-speed CMOS technology

ELAN Microelectronics 

EM78P153E

OTP ROM

4. FUNCTION DESCRIPTION

OSCO

OSCI

/RESET

WDT timer

TCC /INT

Oscillator/Timing

Control

Prescaler

ROM

R2

Stack

Built-in

OSC

RAM

Interrupt

Controller

R3

R1(TCC)

Instruction

Register

Instruction

Decoder

ALU

R3

ACC

DATA & CONTROL BUS

IOC6

R6

I/O

PORT 6

P60

P61

P62/TCC

P63/REST

P64/OSCO

P65/OSCI

P66

P67

Fig. 2 Function Block Diagram

4.1 Operational Registers

1. R0 (Indirect Addressing Register)

R0 is not a physically implemented register. Its major function is to be an indirect addressing pointer.

Any instruction using R0 as a pointer, actually accesses data pointed by the RAM Select Register

(R4).

2. R1 (Time Clock /Counter)

• Increased by an external signal edge, which is defined by TE bit (CONT-4) through the TCC pin, or

by the instruction cycle clock.

• Writable and readable as any other registers.

• Defined by resetting PAB(CONT-3).

• The prescaler is assigned to TCC if the PAB bit (CONT-3) is reset.

• The contents of the prescaler counter is cleared only when a value is written to TCC register.

This specification is subject to change without prior notice.

6

2002/03/01

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