EM78P451WM datasheet(35/54 Pages) EMC

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EM78P451

8-Bit Microcontroller with OTP ROM

Product Specification (V1.1) 06.30.2003

• 31

(This specification is subject to change without further notice)

Table 5 Related Status/Data Registers ofTMR1

Address

Name

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

0X0E

TMR1/RE TMR17 TMR16 TMR15 TMR14 TMR13 TMR12 TMR11 TMR10

0x0F

PWP/RF

PWP7

PWP6

PWP5

PWP4

PWP3

PWP2

PWP1

PWP0

0x0C

T1CON/IOCC

TM1E TM1P1 TM1P0

TMR1:

Timer1 Register

TMR17~TMR10 is bit set of Timer1 register and it increases until the

value matches PWP and then it reset to 0.

PWP:

Pulse Width Preset Register

PWP7~PWP0 is bit set of pulse width preset for the desired width of baud

clock in advance.

T1CON:

Timer1 Control Register

TM1E (bit2):

Timer1 enable bit

TM1P1 and TM1P0 (bit1~0):

Timer1 prescaler for FSCO

TM1P1

TM1P0

Prescaler Rate

1:1

1:4

1:8

1:16

4.7 RESET and Wake-up

A RESET is initiated by

(1) Power on reset, or

(2) WDT timeout. (if enabled)

WDTE

Setup

Tim e

WDT

WDT tim eout

Pow er-

on Reset

Voltage

Detector

Oscillator

VDD

CLK

CLR

CLK

Reset

Fig. 16 Block Diagram of Reset

EM78P451WM Datasheet(PDF) 35 Page - ELAN Microelectronics Corp

EM78P451WM Datasheet(HTML) 35 Page - ELAN Microelectronics Corp

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