EM78P153SP View Datasheet(PDF) - Elan Microelectronics Corp

Part Name

Description

Manufacturer

EM78P153SP

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

Elan Microelectronics Corp 

EM78P152/3S

8-Bit Microcontroller with OTP ROM

5 Functional Description

OSCO

OSCI

/RESET

Oscillator/Timing

Control

WDT Timer

TCC /INT

Prescaler

ROM

R2

Stack

Built-in

OSC

RAM

Interrupt

Controller

R4

R1 (TCC)

Instruction

Register

Instruction

Decoder

ALU

R3

ACC

DATA & CONTROL BUS

P60

P61

IOC6 I/O

P62/TCC

P63//REST

IOC5 I/O

P50

P51

R6

Port 6

P64/OSCO

P65/OSCI

R6

Port 5

P52

P53

P66

P67

Figure 5-1 EM78P153S Functional Block Diagram

5.1 Operational Registers

5.1.1 R0 (Indirect Addressing Register)

R0 is not a physically implemented register. It is used as an indirect addressing

pointer. Any instruction using R0 as a pointer actually accesses data pointed by the

RAM Select Register (R4).

5.1.2 R1 (Timer Clock /Counter)

„ Incremented 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 will be cleared only when the TCC register is

written with a value.

Product Specification (V1.8) 09.08.2009

•5

(This specification is subject to change without further notice)

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