EM6635 Datasheet, PDF (1/39 Pages) EM Microelectronic - MARIN SA – Low Power Microcontroller with RC and 32kHz oscillators and 9 high drive outputs

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
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 selectable
Die form and MLF2, 40 pin (Micro Lead Frame)
package
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.
Copyright  2002, EM Microelectronic-Marin SA
Figure 1. Architecture
Crystal
Oscillator
32kHz
or
External
clock
ROM
4096 x 16Bits
RAM
256 x 4Bits
RC Oscillator
500kHz
Watch Dog
timer
Timer 1
VLD 3levels
Frequency
Doubler
Power Supply
Voltage reg.
Reset
Logic
Core
EM6600
Timer 2
BCD
Counter
Frequency
Generator
Interrupt
Controller
Port 1
Port 2
Port 3
Port 4 Port 5
Port 6
Port 7
0123 0123 0123 0123 0123 0123 0123
High Drive Output
Serial or
parallel port
2 : High Drive Output
3 : Buzzer out
Figure 2. Typical application
SIO
+V_BAT
Stepping Motors
P4
P5
P1
P2
P3
P72
EM6635
VBAT
PI E Z O
BZ
CENV
P6
P70,P71
+V_BAT
Reset IN
QIN QOUT
VSS
32kHz Xtal
Reset Out
VRR
C VRR
Applications
Watch & clock
Timer / sports timing devices
Security / industrial
Toys
Sensor interface
03/03 REV. B
1
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