EM MICROELECTRONIC
- MARIN SA
EM6635
Low Power Microcontroller with RC and 32kHz oscillators
and 9 high drive outputs
Features
32’768Hz crystal oscillator
500kHz RC Oscillator (no external component)
External clock (metal option)
9 High drive outputs: up to 20mA
Melody generator with 255 programmable
frequencies
True Low Power:
1.5uA active mode
0.4uA halt mode
@ 1.55V, 32kHz, 25°C
Figure 1. Architecture
Crystal
Oscillator
32kHz
RC Oscillator
500kHz
or
External
clock
ROM
4096 x 16Bits
RAM
256 x 4Bits
Watch Dog
timer
Timer 1
VLD 3levels
Timer 2
Frequency
Doubler
Power Supply
Voltage reg.
Reset
Logic
Core
EM6600
B CD
Counter
Frequency
Generator
Interrupt
Controller
Low Supply Voltage 1.2V to 3.6V
Max. 14 Inputs with selectable debouncers; Port P1,
P2, P6, P70, P71
Max. 15 outputs (9 I/O High drive outputs); Port P3,
P4, P6, P70, P71, P72
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
Prescaler down to 1Hz (crystal =32kHz), readable by
CPU in 2 ranges
Serial Port as selectable configuration of Port 5
18 Interrupts: 12 internal, 6 external
Voltage Level Detector, 3 levels software selectab
le
Die form and MLF2, 40 pin (Micro Lead Frame)
package
Port 1
0 1 2 3
Port 2
0 1 2 3
Port 3
0 1 2 3
Port 4
0 1 2 3
Port 5
0 1 2 3
Port 6
0 1 2 3
Port 7
0 1 2 3
High Drive Output
Serial or
parallel port
2 : High Drive Output
3 : Buzzer out
Figure 2. Typical application
Stepping Motors
P4
SIO
P5
P3
P72
V BAT
BZ
PI E Z O
P1
P2
CENV
EM6635
P6
+V
BAT
P70,P71
+V
BAT
Reset IN
Reset Out
QOUT
VSS
VRR
C
VRR
32kHz Xtal
Description
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.
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.
It has a frequency/melody generator with 255
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.
QIN
Applications
Watch & clock
Timer / sports timing devices
Security / industrial
Toys
Sensor interface
03/03 REV. B
Copyright
2002, EM Microelectronic-Marin SA
1
www.emmicroelectronic.com
EMMICRO [ EM MICROELECTRONIC - MARIN SA ]
