EM6540 EM Microelectronic, EM6540 Datasheet - Page 8

• Manufacturer Part Number: EM6540
• Description: (EM65xx) Mask Rom
• Manufacturer: EM Microelectronic

Watchdog metal option
The Watch-Dog timer is always active.
Watchdog metal option
W0 WD timer
Supply Voltage Level Detector
T= -10°C to 60°C
Additional registers
In EM6504 there are two additional registers replacing metal options in EM6604.
Register
name
PaIRQedge
PcOE
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
Note1: This capacitor maintains the Regulated Supply to the core when the core has been isolated
Copyright © 2005, EM Microelectronic-Marin SA
Parameter
Temperature
VDD
VSS
CVDDCA
fq
Rqs
CL
df/f
Symb.
VSVLD1
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.
add
hex
63
60
Parameter
SVLD voltage Level1
Watch-Dog timer ACTIVE
add
dec
99
96
reset
value
b'3210
0000
0000
+2.0 ...+5.0V
Value
min. 100nF (note1)
0 V (reference)
0°C...+60°C
+/- 30 ppm
32768 Hz
35 kOhm
8.2pF
x
write_bits
Read/Write_bits
0: PA0r
1: PA1r
2: PA2r
3: PA3r
0: PCoe0
1: PCoe1
2: PCoe2
3: PCoe3
Min.
2.02
Description
capacitor
Vreg switched logic supply
nominal frequency
typical quartz serial resistor
typical quartz load capacitance
quartz frequency tolerance
8
read_bits
Watch-Dog timer INACTIVE
Typ.
2.30
Remarks
Port A IRQ edge
1 = rising
0 = falling
Port C Output Enable
1 = output
0 = input
Max.
2.38
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EM65XX
Unit
V