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PDF EM6625 Data sheet ( Hoja de datos )
| Número de pieza | EM6625 | |
| Descripción | Ultra-low power microcontroller | |
| Fabricantes | EM Microelectronic | |
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R EM MICROELECTRONIC - MARIN SA
EM6625
Ultra Low Power Microcontroller with 4x20 LCD Driver
Features
True Low Power 1.6 µA active mode, LCD On
0.4 µA standby mode, LCD Off
0.2 µA sleep mode
@ 3 V, 32 KHz, 25 ºC
Low Supply Voltage 1.2 V to 3.6 V
Melody, 7 tones + silence inclusive 4-bit timer
Universal 10-bit counter, PWM, event counter
LCD 20 segments, 3 or 4 times multiplexed
Temperature compensated LCD voltage levels
Built-in LCD voltage multipliers
LCD frequency 32 Hz/42.7 Hz/64 Hz
32 KHz or 128 kHz crystal oscillator
72 basic instructions
2 clocks per instruction cycle
Mask ROM 4k x 16 bits
RAM 128 x 4 bits
Max. 12 inputs ; port A, port B, port SP
Max. 8 outputs ; port B, port SP
Voltage Level Detector (VLD), 8 levels software
selectable from 1.2 V up to 4.0 V
Prescaler down to 1 second ( crystal = 32 KHz )
1/1000 sec 12 bit binary coded decimal counter with
hard or software start/stop function
3 wire serial port , 8 bit, master and slave mode
5 external interrupts (port A, serial interface)
8 internal interrupts (3x prescaler, BCD counter
2x10-bit counter, melody timer, serial interface)
timer watchdog and oscillation supervisor
Description
The EM6625 is an ultra-low power, low voltage
microcontroller with an integrated 3/4 MUX x 20
segments LCD driver and the equivalent of 8kB mask
ROM. It features temperature compensated LCD voltage
levels, free LCD segment allocation and built-in voltage
multipliers. It also has a melody generator, a millisecond
counter (BCD) and PWM function. Tools include
windows-based simulator and emulator. A flexible MFP
version is also available for development stage.
Due to its very low current consumption, the EM6625 is
ideal for use in battery-operated and field-powered
applications.
Typical Applications
Household appliance
Timer / sports timing devices
Medical devices
Interactive system with display
Automotive controls with display
Measurement equipment
Bicycle computers
Safety and security devices
Figure 1. Architecture
32/128 KHz
Crystal Osc
VLD 8 Levels
Prescaler
Millisecond
Counter
10-Bit Univ
Count/Timer
Interrupt
Controller
ROM
4k X 16Bit
RAM
128*4Bit
VDD
Power
Supply
Core
EM6600
Power on
Reset
Watchdog
Melody
Generator
Voltage
Multiplier
Port A
0123
Port B
0123
Serial
Interface
LCD Controller
3, 4 X 20
PWM
PWM
Figure 2. Pin Configuration, TQFP52
TQFP52
VL1
VL2
VL3
COM[1]
COM[2]
COM[3]
COM[4]
SEG[20]
SEG[19]
SEG[18]
SEG[17]
SEG[16]
SEG[15]
1
2
3
4
5
6
7
8
9
10
11
12
13
EM6625
39 PA[1]
38 PA[0]
37 PB[3]
36 PB[2]
35 PB[1]
34 PB[0]
33 PS[3]
32 PS[2]
31 PS[1]
30 PS[0]
29 TEST
28 RESET
27 SEG[1]
Copyright © 2005, EM Microelectronic-Marin SA
1
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1 page  
R
EM6625
Chip
TQFP
52
DIL
64
Signal Name
Function
Remarks
35 35
51
PB[1]
Input/output, open drain
Port B data[1] I/O or
port B terminal 1
Ck[11] output
36 36
52
PB[2]
Input/output, open drain
Port B data[2] I/O or
port B terminal 2
Ck[16] output
37 37
53
PB[3]
Input/output, open drain
Port B data[3] I/O or
port B terminal 3
PWM output
38 38
54
PA[0]
Input port A terminal 0
TestVar 1
Event counter
39 39
55
PA[1]
Input port A terminal 1
TestVar 2
40 40
58
PA[2]
Input port A terminal 2
TestVar 3
41 41
59
PA[3]
Input port A terminal 3
Event counter,
MSC start/stop control
42 42
60
Buzzer
Output Buzzer terminal
43 43
61
Strobe
Output Strobe terminal
µP reset state or/and port B
write or sleep flag out
44 44 62 Vbat = VDD
Positive power supply
MFP Connection
45 45
63
Vreg
Internal voltage regulator
Connect to minimum 100nF,
MFP connection
46 46
64
Qin/Osc1
Crystal terminal 1
32 or 128KHz crystal, MFP
connection
47 47 2 Qout /Osc2
Crystal terminal 2
32 or 128KHz crystal, MFP
connection
48 48
3
VSS
Negative power supply
ref. terminal, MFP connection
49 49
4
C2B
Voltage multiplier
Not needed if ext. supply
50 50
5
C2A
Voltage multiplier
Not needed if ext. supply
51 51
6
C1B
Voltage multiplier
Not needed if ext. supply
52 52
7
C1A
Voltage multiplier
Not needed if ext. supply
Gray shaded areas : Terminals needed for MFP programming connections (VDD, Vreg, Qin, Qout, Test).
Figure 3. Typical Configuration
LCD Display
C ry s ta l
All Capacitors 100nF
C1
VL1
CO M [4:1]
SEG [20:1]
Q in O out
C1 VL2
C1
VL3
C1A
C2 C1B
C2 C2A
C2B
EM6625
Reset
VDD (Vbat)
Vreg
Port A
Test
Port B
Port SP
Buzzer
Strobe
VSS
C3 C4
Copyright © 2005, EM Microelectronic-Marin SA
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5 Page 
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EM6625
5. Oscillator and Prescaler
5.1 Oscillator
A built-in crystal oscillator generates the system operating clock for the CPU and peripheral blocks, from an
externally connected crystal (typically 32.768kHz or 128kHz: selection done by metal option). The oscillator
circuit is supplied by the regulated voltage, Vreg. In sleep mode the oscillator is stopped.
EM’s special design techniques guarantee the low current consumption of this oscillator. The external
impedance between the oscillator pads must be greater than 10MOhm. Connection of any other components to
the two oscillator pads must be confirmed by EM Microelectronic-Marin SA.
If the typical 128kHz option is selected, a special 4 stage frequency divider is added automatically by EM
Microelectronics to deliver to the prescaler 32kHz which generates all system clocks except CPU clock
frequency to keep the peripheral timing as close as possible to the specification.
5.2 Prescaler
The prescaler consists of fifteen elements divider chain which delivers clock signals for the peripheral circuits
such as timer/counter, buzzer, LCD voltage multiplier, debouncer and edge detectors, as well as generating
prescaler interrupts. The input to the prescaler is the system clock signal. Power on initializes the prescaler to
Hex(0001).
Table 5.2.1 Prescaler Clock Name Definition
Function
System clock
System clock / 2
System clock / 4
System clock / 8
System clock/ 16
System clock / 32
System clock / 64
System clock / 128
Name
Ck[16]
Ck[15]
Ck[14]
Ck[13]
Ck[12]
Ck[11]
Ck[10]
ck [9]
32 KHz Xtal
32768 Hz
16384 Hz
8192 Hz
4096 Hz
2048 Hz
1024 Hz
512 Hz
256 Hz
Function
System clock / 256
System clock / 512
System clock / 1024
System clock / 2048
System clock / 4096
System clock / 8192
System clock / 16384
System clock / 32768
Name
Ck[8]
Ck[7]
Ck[6]
Ck[5]
Ck[4]
Ck[3]
Ck[2]
Ck[1]
32 KHz Xtal
128 Hz
64 Hz
32 Hz
16 Hz
8 Hz
4 Hz
2 Hz
1 Hz
Table 5.2.2 Control of Prescaler Register RegPresc
Bit Name
Reset R/W Description
3 PWMOn 0
R/W see 10 bit counter
2 ResPresc 0
R/W Write Reset prescaler
1 -> Resets the divider chain
from Ck[14] down to
Ck[2], sets Ck[1].
0 -> No action.
1 PrIntSel 0
0 DebSel 0
The Read value is always '0'
R/W Interrupt select.
0 -> Interrupt from Ck[4]
1 -> Interrupt from Ck[6]
R/W Debouncer clock select.
0 -> Debouncer with Ck[8]
1 -> Debouncer with Ck[11] or
Ck[14]
Figure 8. Prescaler Frequency Timing
Prescaler Reset
System Clock
Ck[16]
Ck[15]
Ck[14]
Ck[2]
Ck[1]
Horizontal Scale Change
First positive edge of 1 Hz clock is 1s after
the falling reset edge
With DebSel = 1 one may choose either the Ck[11] or Ck[14] debouncer frequency by selecting the
corresponding metal mask option. Relative to 32kHz the corresponding max. debouncer times are then 2 ms or
0.25 ms. For the metal mask selection refer to chapter 18.1.6.
Switching the PrIntSel may generate an interrupt request. Avoid it with MaskIRQ32/8 = 0 selection during the
switching operation.
Copyright © 2005, EM Microelectronic-Marin SA
11
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11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet EM6625.PDF ] | |
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