MC80F0804D View Datasheet(PDF) - Unspecified

Part Name

Description

Manufacturer

MC80F0804D

8-BIT SINGLE-CHIP MICROCONTROLLERS

Unspecified 

MC80F0704/0708/0804/0808

22. Device Configuration Area

The Device Configuration Area can be programmed or left un-

programmed to select device configuration such as POR, ONP,

CLK option and security bit. This area is not accessible during

normal execution but is readable and writable during FLASH

program / verify mode.

Note: The Configuration Option may not be read exactly

when VDD rising time is very slow. It is recommended to

adjust the VDD rising time faster than 40ms/V (200ms from

0V to 5V).

7

6

5

4

3

2

1

0

Configuration Option Bits ONP OFP LOCK POR R35EN CLK2 CLK1 CLK0

ADDRESS: 20FFH

INITIAL VALUE: 00H

Oscillation configuration

000 : IN4MCLK (Internal 4MHz Oscillation & R33/R34 Enable)

001 : IN2MCLK (Internal 2MHz Oscillation & R33/R34 Enable)

010 : EXRC (External R/RC Oscillation & R34 Enable)

011 : X-tal (Crystal or Resonator Oscillation)

100 : IN4MCLKXO (internal 4MHz Oscillation & R33 Enable

& XOUT = fSYS ÷ 4)

101 : IN2MCLKXO (internal 2MHz Oscillation & R33 Enable

& XOUT = fSYS ÷ 4)

110 : EXRCXO (External R/RC Oscillation & XOUT = fSYS ÷ 4)

111 : Prohibited

RESET/R35 Port configuration

0 : R35 Port Disable (Use RESET)

1 : R35 Port Enable (Disable RESET)

POR Use

0 : Disable POR Reset

1 : Enable POR Reset

Security Bit

0 : Enable reading User Code

1 : Disable reading User Code

OFP use

0 : Disable OFP (Clock Changer)

1 : Enable OFP (Clock Changer)

ONP disable

0 : Enable ONP (Enable OFP, Internal 4MHz/2MHz oscillation)

1 : Disable ONP (Disable OFP, Internal 4MHz/2MHz oscillation)

Figure 22-1 Device Configuration Area

October 31, 2011 Ver 1.03

101

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