EM MICROELECTRONIC - MARIN SA
EM6635
Low Power Microcontroller with RC and 32kHz oscillators
and 9 high drive outputs
Features
Figure 1. Architecture
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32’768Hz crystal oscillator
Crystal
External
clock
R O M
R A M
Watch Dog
timer
Oscillator or
32kHz
4096 x 16Bits
256 x 4Bits
500kHz RC Oscillator (no external component)
External clock (metal option)
9 High drive outputs: up to 20mA
RCOscillator
500kHz
Timer 1
Timer 2
Melody generator with 255 programmable
VLD 3levels
frequencies
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True Low Power: 1.5uA active mode
Core
Frequency
Doubler
B C D
EM6600
Counter
0.4uA halt mode
@ 1.55V, 32kHz, 25°C
Power Supply
Voltage reg.
Frequency
Generator
Low Supply Voltage 1.2V to 3.6V
Reset
Logic
Interrupt
Controller
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Max. 14 Inputs with selectable debouncers; Port P1,
P2, P6, P70, P71
Port 1
Port 2
Port 3
Port 4
Port 5
Port 6
Port 7
Max. 15 outputs (9 I/O High drive outputs); Port P3,
0
1
2
3
0
1
2
3
0
1
2
3
0
1
2
3
0
1
2
3
0
1
2
3
0 1 2 3
P4, P6, P70, P71, P72
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Mask ROM 4096 x 16bits
RAM 256 x 4bits
2 clocks per instruction cycle
72 basic instructions
2 outputs; Reset OUT, Buzzer OUT
2 timers 8bits
2 x 4 bits BCD counters
Event counter 3bits
Serial or
2 : High Drive Output
3 : Buzzer out
High Drive Output
parallel port
Figure 2. Typical application
Stepping Motors
PI E Z O
V
P4
P3
P72
BAT
Prescaler down to 1Hz (crystal =32kHz), readable by
SIO
P5
BZ
CPU in 2 ranges
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Serial Port as selectable configuration of Port 5
18 Interrupts: 12 internal, 6 external
P1
P2
CENV
P6
EM6635
Voltage Level Detector, 3 levels software selectable
+VBAT
P70,P71
Die form and MLF2, 40 pin (Micro Lead Frame)
package
+VBAT
Reset Out
Reset IN
QIN
QOUT
VSS
VRR
Description
CVRR
The EM6635 is a low voltage, low power microcontroller
containing 9 integrated high-drive outputs able to provide
up to 20mA. It is ideal for use in applications in which one
must drive devices such as motor drivers, small stepping
motors, LEDs, triacs, external EEPROM or other ICs in
the system.
32kHz Xtal
Applications
EM6635 has both a 32kHz crystal oscillator and a
500kHz RC oscillator without external component, as well
as an external clock to be driven up to 4MHz.
The CPU operating clock can be switched from crystal to
RC oscillator for high-speed operation.
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Watch & clock
Timer / sports timing devices
Security / industrial
Toys
It has
a
frequency/melody generator with 255
Sensor interface
programmable frequencies for quality buzzer.
The EM6635 contains the equivalent of 8kB mask ROM
and the RAM has a capacity of 256x4 bits.
It also has a power-on reset, watchdog timer, 2 timers
8bits, 2 BCD counters, 3bits event counter, 4 wire serial
port 8bits and several clock functions.
03/03 REV. B
1
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Copyright 2002, EM Microelectronic-Marin SA