EM78P152S datasheet(30/52 Pages) ETC1

30 / 52 page

EM78P152/3S

8-Bit Microcontroller with OTP ROM

•

Product Specification (V1.8) 09.08.2009

(This specification is subject to change without further notice)

5.8 Code Option Register

The EM78P152/3S has a Code Option word that is not a part of the normal program

memory. The option bits cannot be accessed during normal program execution.

Code Option Register and Customer ID Register Arrangement Distribution:

Word 0

Word 1

Word 2

Bit 12 ~ Bit 0

5.8.1 Code Option Register (Word 0)

Word 0

Bit 12

Bit 11

Bit 10

Bit 9

Bit 8

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3 Bit 2 Bit 1 Bit 0

/RESET /ENWDT

CLKS

OSC1

OCS0

SUT1

SUT0

TYPE RCOUT C2

Bit 12 (/RESET):

Define Pin 7 as a reset pin

0 : /RESET enable

1 : /RESET disable

Bit 11 (/ENWTD):

Watchdog timer enable bit

0 : Enable

1 : Disable

NOTE

This bit must be enabled and the WDTE register (IOCE reg. Bit 6) must be disabled

when Port 6 pin change wake-up function is used.

Bit 10 (CLKS):

Instruction period option bit.

0 : two oscillator periods

1 : four oscillator periods

Refer to the Instruction Set section.

Bit 9 and Bit 8 (OSC1 and OSC0): Oscillator Modes Selection bits.

Table 5-9 Oscillator Modes defined by OSC1 and OSC0

Mode

OSC1

OSC0

IRC (Internal RC oscillator mode)

ERC (External RC oscillator mode)

HXT (High Crystal oscillator mode)

LXT (Low Crystal oscillator mode)

Note:

The transient point of system frequency between HXT and LXY is 400kHz.

EM78P152S 数据表(PDF) 30 Page - List of Unclassifed Manufacturers

EM78P152S 数据表(HTML) 30 Page - List of Unclassifed Manufacturers

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52

数据表下载