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EM6522 Schematic ( PDF Datasheet ) - EM Microelectronic

Teilenummer EM6522
Beschreibung MFP version of EM6622 Ultra Low Power Microcontroller
Hersteller EM Microelectronic
Logo EM Microelectronic Logo 




Gesamt 30 Seiten
EM6522 Datasheet, Funktion
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EMwww.DataSheet4U.com
MICROELECTRONIC
-
MARIN
SA
EM6522
MFP version of EM6622
Ultra Low Power Microcontroller with 4x32 LCD Driver
Features
Low Power - 11 µA active mode, LCD On
- 1.8 µA standby mode, LCD Off
- 0.1 µA sleep mode
@ 3 V, 32 KHz, 25 ºC
Large Voltage range, 2 to 5.5 V
2 clocks per instruction cycle
72 basic instructions
EEPROM 4096 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, 8 levels software
selectable from 1.2 V up to 4.0 V
Melody, 7 tones + silence inclusive 4-bit timer
Universal 10-bit counter, PWM, event counter
Prescaler down to 1 second ( crystal = 32 KHz )
1/1000 sec 12 bit binary coded decimal counter
with hard or software start/stop function
LCD 32 Segments, 3 or 4 times multiplexed
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 EM6522 is an advanced single chip CMOS 4-
bit microcontroller. It contains EEPROM, RAM,
LCD driver, power on reset, watchdog timer,
oscillation detection circuit, 10-bit up/down and
event counter, 1ms BCD counter, prescaler,
voltage level detector (Vld), serial interface 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 EM6522 is manufactured
using EM Microelectronic’s Advanced Low Power
(ALP) CMOS Process.
Figure 1. Architecture
Figure 2. Pin Configuration, TQFP64 10 x 10 x 1 mm
Typical Applications
Timing device
Automotive controls with display
Intelligent display driver
Measurement equipment
Domestic appliance
Interactive system with display
Timer / sports timing devices
Bicycle computers
Safety and security devices
Copyright © 2005, EM Microelectronic-Marin SA
1
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EM6522 Datasheet, Funktion
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Figure 3. Typical Configuration
LC D D isplay
C rys ta l
EM6522
All Capacitors 100nF
C1
VL1
CO M [4:1]
SEG [20:1]
Qin Oout
C1 VL2
C1
VL3
Reset
C2
C1A
C1B
C2 C2A
C2B
EM6522
VDD (Vbat)
Vreg
Port A
Test
Port B
Port SP
Buzzer
Strobe
VSS
C3 C4
1.1 Programming Connections
The EM6522 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 TQFP
64
45 50
60 1
61 2
62 3
63 4
64 5
DIL
64 Signal Name
42 Test
57 Vbat = VDD
58 Vreg
59 Qin/Osc1
60 Qout /Osc2
61 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 © 2005, EM Microelectronic-Marin SA
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EM6522 pdf, datenblatt
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EM6522
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 10MOhm. 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
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], see below
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 (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 18.1.5.
12H
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
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