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PDF EM6520 Data sheet ( Hoja de datos )
| Número de pieza | EM6520 | |
| Descripción | MFP version of EM6620 Ultra Low Power Microcontroller 4x8 LCD Driver | |
| Fabricantes | EM Microelectronic | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de EM6520 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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EMwww.DataSheet4U.com MICROELECTRONIC - MARIN SA
EM6520
MFP version of EM6620
Ultra Low Power Microcontroller 4x8 LCD Driver
Features
• Low Power - 8 µA active mode, LCD On
- 1.1 µA standby mode, LCD Off
- 0.1 µA sleep mode
@ 3 V, 32 kHz, 25°C
• Large Voltage range, 2 to 5.5 V
• SVLD, default (2.4V)
• EEPROM, 2048 × 16 bits
• RAM, 64 × 4 bits
• 2 clocks per instruction cycle
• 72 basic instructions
• Oscillation supervisor
• Timer watchdog (2 sec)
• Max. 8 inputs ; port A, port B
• max. 4 outputs ; port B
• LCD 8 segments, 3 or 4 times multiplexed
• Universal 10-bit counter, PWM, event counter
• Prescaler down to 1 Hz (crystal = 32 KHz)
• 1/1000 sec, 12 bit binary coded decimal counter
with hard or software start/stop function
• Frequency output 1Hz, 2048 Hz, 32 KHz, PWM
• 7 internal interrupt sources (BCD counter,
• 2×10-bit counter, 3× prescaler, SVLD)
• 5 external interrupt sources (port A, compare)
Description
The EM6520 is an advanced single chip CMOS 4-
bit microcontroller. It contains EEPROM, RAM,
power on reset, watchdog timer, oscillation
detection circuit, 10 bit up/down counter,
Millisecond counter, prescaler, voltage level detec-
tor (SVLD), compare input, frequency output, LCD
driver and several clock functions. The low voltage
feature and low power consumption make it the
most suitable controller for battery, stand alone and
mobile equipment. The EM6520 is manufactured
using EM Microelectronic’s Advanced Low Power
(ALP) CMOS Process.
Typical Applications
• Timing device
• Medical applications
• Domestic appliance
• Timer / sports timing devices
• Safety and security devices
• Automotive controls with display
• Measurement equipment
• Interactive system with display
• Bicycle computers
Figure 1. Architecture
Figure 2. Pin Configuration
Copyright 2002, EM Microelectronic-Marin SA
1
03/02 REV. D/449
www.emmicroelectronic.com
1 page  
EM6520
Figure 3. Typical configuration
LC D D isplay
crystal
all Capacitors 100nF
C1
VL1
CO M[4:1]
SEG [8:1]
C1 VL2
C1
VL3
Q IN
QOUT
C2
C1A
C1B
C2 C2A
C2B
Port A
Port B
EM6520
VDD (VBAT)
Vreg
Test
VSS
C3 C4
1.1 Programming Connections
The EM6520 can be programmed using the standard EM MFP programming box for 4 bit uControllers. The
interface signals are listed in the table below. The circuit can be programmed on the programming box or
directly on the PCB . For more information please refer to the MFP programmer’s manual.
Chip QFP DIL QFP
44 40 32 Signal Name
20 37 29 27
Test
29 5 39 4 VBAT=VDD
30 6 40 5
Vreg
31 8
32 10
33 11
1
3
5
6 Qout / Osc2
7 Qin / Osc1
8 VSS
Function
Input test terminal
Internal pull-down 15k
Positive power supply
Internal voltage regulator
Crystal terminal
Crystal terminal
Negative power supply
Remarks
Usually 1 in MFP mode, 0 resets the
MFP interface
MFP Power Connection
MFP power Connection, adapts the
Oscillator voltage to VBAT
MFP Serial Data Input / Output
MFP serial Clock Input
MFP Connection, Reference terminal
Copyright 2002, EM Microelectronic-Marin SA
5
03/02 REV. D/449
www.emmicroelectronic.com
5 Page 
EM6520
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). 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 10 MegOhm. Connection of any other components
to the two oscillator pads must be confirmed by EM Microelectronic-Marin SA.
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
Name
32 KHz Xtal
System clock
Ck[16]
32768 Hz
System clock / 2
Ck[15]
16384 Hz
System clock / 4
Ck[14]
8192 Hz
System clock / 8
Ck[13]
4096 Hz
System clock/ 16
Ck[12]
2048 Hz
System clock / 32
Ck[11]
1024 Hz
System clock / 64
Ck[10]
512 Hz
System clock / 128
ck [9]
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.
Figure 8. Prescaler Frequency Timing
Prescaler Reset
System Clock
Ck[16]
Ck[15]
1 PrIntSel 0
0 DebSel 0
R/W
R/W
The Read value is always '0'
Interrupt select.
0 -> Interrupt from Ck[4]
1 -> Interrupt from Ck[6]
Debouncer clock select.
0 -> Debouncer with Ck[8]
1 -> Debouncer with Ck[11]
or Ck[14], see below.
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 (for ROM version only). Relative to
32kHz the corresponding max. debouncer times are then 2 ms or 0.25 ms. For the metal mask selection refer
to chapter 16.1.5.
Switching the PrIntSel may generate an interrupt request. Avoid it with MaskIRQ32/8 = 0 selection during the
switching operation.
Copyright 2002, EM Microelectronic-Marin SA
11
03/02 REV. D/449
www.emmicroelectronic.com
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet EM6520.PDF ] | |
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