EM65XX

Copyright

© 2005, EM Microelectronic-Marin SA

8

www.emmicroelectronic.com

Watchdog metal option

The Watch-Dog timer is always active.

Watchdog metal option

Watch-Dog timer ACTIVE

Watch-Dog timer INACTIVE

W0

WD timer

x

Supply Voltage Level Detector

T= -10°C to 60°C

Symb.

Parameter

Min.

Typ.

Max.

Unit

VSVLD1

SVLD voltage Level1

2.02

2.30

2.38

V

Additional registers

In EM6504 there are two additional registers replacing metal options in EM6604.

Register

name

add

hex

add

dec

reset

value

write_bits

read_bits

Remarks

b'3210

Read/Write_bits

PaIRQedge

63

99

0000

0: PA0r

1: PA1r

2: PA2r

3: PA3r

Port A IRQ edge

1 = rising

0 = falling

PcOE

60

96

0000

0: PCoe0

1: PCoe1

2: PCoe2

3: PCoe3

Port C Output Enable

1 = output

0 = input

Because these two registers replace the metal option in EM6604 it is advised that they are written as

first two instructions in the main program and that they are executed only once. They should not be

changed later in the program because the metal options in EM6604 are fixed.

Electrical specifications

Standard Operating Conditions

Parameter

Value

Description

Temperature

0°C...+60°C

VDD

+2.0 ...+5.0V

VSS

0 V (reference)

CVDDCA

min. 100nF (note1)

Vreg switched logic supply

capacitor

fq

32768 Hz

nominal frequency

Rqs

35 kOhm

typical quartz serial resistor

CL

8.2pF

typical quartz load capacitance

df/f

+/- 30 ppm

quartz frequency tolerance

Note1: This capacitor maintains the Regulated Supply to the core when the core has been isolated

by the internal Supply switch during driving the high current outputs. The user should be

aware that the selection of this capacitor will dictate the time that the core can be isolated.