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PDF M37544G Data sheet ( Hoja de datos )
| Número de pieza | M37544G | |
| Descripción | Single-Chip 8-Bit CMOS Microcomputer | |
| Fabricantes | Mitsubishi Electric | |
| Logotipo |  |
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MITSUBISHI MICROCOMPUTERS
7544 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
DESCRIPTION
The 7544 Group is the 8-bit microcomputer based on the 740 fam-
ily core technology.
The 7544 Group has a serial I/O, 8-bit timers, a 16-bit timer, and
an A-D converter, and is useful for control of home electric appli-
ances and office automation equipment.
FEATURES
• Basic machine-language instructions ...................................... 71
• The minimum instruction execution time ......................... 0.25 µs
(at 8 MHz oscillation frequency, double-speed mode for the
shortest instruction)
• Memory size ROM ......................................................... 8 K bytes
RAM ........................................................ 256 bytes
• Programmable I/O ports ........................................................... 25
• Interrupts ................................................. 12 sources, 12 vectors
• Timers ............................................................................. 8-bit ✕ 2
...................................................................................... 16-bit ✕ 1
• Serial I/O ...................... 8-bit ✕ 1 (UART or Clock-synchronized)
• A-D converter ................................................. 8-bit ✕ 6 channels
• Clock generating circuit ............................................. Built-in type
(low-power dissipation by a ring oscillator enabled)
(connect to external ceramic resonator or quartz-crystal oscilla-
tor permitting RC oscillation)
• Watchdog timer ............................................................ 16-bit ✕ 1
• Power source voltage
XIN oscillation frequency at ceramic/quartz-crystal oscillation, in
double-speed mode
At 8 MHz .................................................................... 4.5 to 5.5 V
XIN oscillation frequency at ceramic/quartz-crystal oscillation, in
high-speed mode
At 8 MHz .................................................................... 4.0 to 5.5 V
XIN oscillation frequency at RC oscillation
At 4 MHz .................................................................... 4.0 to 5.5 V
• Power dissipation .................................................................. TBD
• Operating temperature range ................................... –20 to 85 °C
APPLICATION
Office automation equipment, factory automation equipment,
home electric appliances, consumer electronics, etc.
PIN CONFIGURATION (TOP VIEW)
P12/SCLK
P13/SRDY
P14/CNTR0
P20/AN0
P21/AN1
P22/AN2
P23/AN3
P24/AN4
P25/AN5
VREF
RESET
CNVSS
VCC
XIN
XOUT
VSS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32 P11/TXD
31 P10/RXD
30 P07(LED7)
29 P06(LED6)
28 P05(LED5)
27 P04(LED4)
26 P03(LED3)/TXOUT
25 P02(LED2)
24 P01(LED1)
23 P00(LED0)/CNTR1
22 P37(LED13)/INT0
21 P34(LED12)/INT1
20 P33(LED11)
19 P32(LED10)
18 P31(LED9)
17 P30(LED8)
Package type: 32P4B
Fig. 1 Pin configuration (32P4B type)
1 page  
PRELIMINARYNSootimcee:pTahriasmisetnrioct laimfiintsalasrepescuibfijceacttioton.change.
MITSUBISHI MICROCOMPUTERS
7544 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
PIN DESCRIPTION
Table 1 Pin description
Pin Name
Vcc, Vss
Power source
VREF
Analog reference
voltage
CNVss
______
RESET
CNVss
Reset input
XIN Clock input
XOUT
Clock output
P00/CNTR1
P01
P02
P03/TXOUT
P04–P07
I/O port P0
P10/RxD
P11/TxD
P12/_S_C_L_K
P13/SRDY
P14/CNTR0
I/O port P1
P20/AN0–P25/AN5 I/O port P2
P30–P33
I/O port P3
P34/INT1
P37/INT0
Function
•Apply voltage of 4.5 to 5.5 V to Vcc, and 0 V to Vss.
•Reference voltage input pin for A-D converter
Function expect a port function
•Chip operating mode control pin, which is always connected to Vss.
•Reset input pin for active “L”
•Input and output pins for main clock generating circuit
•Connect a ceramic resonator or quartz crystal oscillator between the XIN and XOUT pins.
•For using RC oscillator, short between the XIN and XOUT pins, and connect the capacitor and resistor.
•If an external clock is used, connect the clock source to the XIN pin and leave the XOUT pin open.
• When the ring oscillator is selected as the main clock, connect XIN pin to VCC and leave XOUT open.
•8-bit I/O port.
•I/O direction register allows each pin to be individually pro-
grammed as either input or output.
•CMOS compatible input level
• Key-input (key-on wake up
interrupt input) pins
• Timer X and timer A function
pin
•CMOS 3-state output structure
•P0 can output a large current for driving LED.
•Whether a built-in pull-up resistor is to be used or not can be de-
termined by program.
•5-bit I/O port
• Serial I/O function pin
•I/O direction register allows each pin to be individually pro-
grammed as either input or output.
•CMOS compatible input level
•CMOS 3-state output structure
• Timer X function pin
•CMOS/TTL level can be switched for P10, P12
•6-bit I/O port having almost the same function as P0
• Input pins for A-D converter
•CMOS compatible input level
•CMOS 3-state output structure
•6-bit I/O port
•I/O direction register allows each pin to be individually programmed as either input or output.
•CMOS compatible input level (CMOS/TTL level can be switched for P34, P37).
•CMOS 3-state output structure
•P3 can output a large current for driving LED.
•Whether a built-in pull-up resistor is to be used or not can be de- • Interrupt input pins
termined by program.
5
5 Page 
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MITSUBISHI MICROCOMPUTERS
7544 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Memory
Special function register (SFR) area
The SFR area in the zero page contains control registers such as
I/O ports and timers.
RAM
RAM is used for data storage and for a stack area of subroutine
calls and interrupts.
ROM
The first 128 bytes and the last 2 bytes of ROM are reserved for
device testing and the rest is a user area for storing programs.
Interrupt vector area
The interrupt vector area contains reset and interrupt vectors.
Zero page
The 256 bytes from addresses 000016 to 00FF16 are called the
zero page area. The internal RAM and the special function regis-
ters (SFR) are allocated to this area.
The zero page addressing mode can be used to specify memory
and register addresses in the zero page area. Access to this area
with only 2 bytes is possible in the zero page addressing mode.
Special page
The 256 bytes from addresses FF0016 to FFFF16 are called the
special page area. The special page addressing mode can be
used to specify memory addresses in the special page area. Ac-
cess to this area with only 2 bytes is possible in the special page
addressing mode.
s Notes on use
The content of RAM is undefined when the microcomputer is re-
set. The initial values must be surely set before you use it.
RAM area
RAM capacity
(bytes)
256
address
XXXX16
013F16
ROM area
ROM capacity
(bytes)
8192
address
YYYY16
E00016
address
ZZZZ16
E08016
Fig. 11 Memory map diagram
RAM
000016
004016
010016
SFR area
Zero page
XXXX16
Reserved area
044016
Not used
YYYY16
Reserved ROM area
(128 bytes)
ZZZZ16
ROM
FF0016
FFDC16
Interrupt vector area
FFFE16
FFFF16 Reserved ROM area
Special page
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet M37544G.PDF ] | |
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