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EM6640 Schematic ( PDF Datasheet ) - EM Microelectronic

Teilenummer EM6640
Beschreibung Low Power Microcontroller
Hersteller EM Microelectronic
Logo EM Microelectronic Logo 




Gesamt 30 Seiten
EM6640 Datasheet, Funktion
EM MICROELECTRONIC - MARIN SA
EM6640
Low Power Microcontroller
with EEPROM AND RC Oscillator
Features
Low Power - 42µA active mode
- 8µA standby mode
- 0.3µA sleep mode
@ 3.0V, 600kHz, 25°C, typ
Voltage Range - 1.9 to 5.5 V
Supply voltage level detection (SVLD)
ROM
- 1280 × 16 bit
RAM
- 80 × 4 bit
EEPROM - 32 x 8 bit
2 clocks per instruction cycle
72 basic instructions
RC oscillator
Oscillation detection circuit / Digital watchdog
timer reset.
Maximum 12 inputs (3 ports)
Maximum 8 outputs (2 ports)
Serial Write Buffer - 256 bits (SWB)
10 bit up/down counter with PWM capability
Frequency out 600kHz, 37.5kHz, 2.3kHz, PWM
Sleep Counter Reset (SCR) programmable.
8 internal interrupt sources (3×prescaler,
2×timer ,1xSWB, 1×SVLD, 1xEEPROM)
4 external interrupt sources (port A)
Reset with input combinations
Packages available : TSSOP16, SO16, SO18
Description
The EM6640 is an advanced single chip CMOS 4-bit
microcontroller. It contains ROM, RAM, EEPROM,
watchdog timer, oscillation detection circuit, 10 bit
up/down counter, prescaler, supply voltage level
detector (SVLD), sleep counter reset (SCR),
frequency output and SWB.
The low voltage feature and low power consumption
make it the most suitable controller for battery, stand
alone and mobile equipment. The EM66XX series is
manufactured using EM Microelectronic’s Advanced
Low Power (ALP) CMOS Process.
Typical Applications
remote controls
medical applications
domestic appliance
safety and security devices
measurement equipment
interactive system
keyless entry with rolling code
Figure 1 Architecture
Figure 2 Pin Configuration of TSSOP16
Copyright 2002, EM Microelectronic-Marin SA
1
03/02 REV. C/446
www.emmicroelectronic.com






EM6640 Datasheet, Funktion
EM6640
The output drivers are supplied directly from the external supply VDD.
4. Reset
Figure 5 illustrates the reset structure of the EM6640. One can see that there are six possible reset sources:
(1) Internal initial reset from the Power On Reset (POR) circuitry.
(2) External reset by simultaneous high/low inputs to PortA.
(Combinations are defined in the registers OptInpRSel1 and OptInpRSel2
(3) Internal reset from the Digital Watchdog.
(4) Internal reset from the Oscillation Detection Circuit.
(5) Internal reset when SLEEP mode is activated.
(6) Internal reset from Sleep Counter Reset.
All reset sources activate the System Reset and the Reset CPU. The ‘System Reset Delay’ ensures that the
System Reset remains active long enough for all system functions to be reset (active for N SysClk cycles).
The ‘CPU Reset Delay‘ ensures that the Reset CPU remains active until the oscillator is in stable oscillation.
As well as activating the System Reset and the Reset CPU, the POR also resets all Option Registers and the
SLEEP ENABLE latch. System Reset and Reset CPU do not reset Option Registers nor the SLEEP ENABLE
latch.
Figure 5. Reset structure
Internal Data Bus
W rite Reset
Read Status
Digital W atchdog
W rite Active
Read Status
SLEEP
ENABLE
Latch
R
CK[1]
SLEEP
Latch
R
POR
Sleep
E
N
S
leep
Re
Co
set
u
n
te
r
Analog
Debouncer
Inhibit
SCR
DEBOUNCER
(for reset)
POR
ck[10]
POR to Option
Registers & SLEEP
ENABLE latch
CK[10]
O scillation
Detection
Inhibit
Digital
W atchdog
ck[11]
CPU Reset
Delay
R es et
set
Reset
CPU
System Reset
Delay
ck[18]
System
Reset
Inhibit
O scillation
detection
Reset from PortA Input
com bination
NoInpReset
Sleep
Copyright 2002, EM Microelectronic-Marin SA
6
03/02 REV. C/446
www.emmicroelectronic.com

6 Page









EM6640 pdf, datenblatt
4.6 CPU State after Reset
Reset initializes the CPU as shown in Table below.
Table 4.6.1 Initial CPU value after Reset.
Name
Bits
Program counter 0
12
Program counter 1
12
Program counter 2
12
stack pointer
2
index register
7
Carry flag
1
Zero flag
1
Halt 1
Instruction register
16
Periphery registers
4
Symbol
PC0
PC1
PC2
SP
IX
CY
Z
HALT
IR
Reg.....
EM6640
Initial Value
$000 (as a result of Jump 0)
undefined
undefined
SP[0] selected
undefined
undefined
undefined
0
Jump 0
see peripheral memory map
Copyright 2002, EM Microelectronic-Marin SA
12
03/02 REV. C/446
www.emmicroelectronic.com

12 Page





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