MA014B Datasheet, PDF (2/14 Pages) Megawin Technology Co., Ltd – Single chip 8-bit CPU

General Description
MA014B integrates an 8-bit CPU core, SRAM, timer and system control circuits by a CMOS silicon
gate technology. The ROM can store data table and program.
Nineteen I/O and one large sink output pin make this chip very suitable for IR application.
Pad Description
Pad No.
Pad Name
10, 9
OSCO, OSCI
14,15
VDD, VDD_1
11
/RES
12
GND
13
IRO
18 ~ 25
16 ~ 17
1~8
P1.0 ~ P1.7
P2.0 ~ P2.1
P0.0 ~ P0.7
I/O Description
O, I Resonator or crystal oscillator pins
P Positive power pins
I System reset pin (low active). Built in pull up 10K ohms.
P Ground pin
IRO output pin. Direct sink (sink current: 100mA) for IR
LED. Default value is high after reset. The IRO output
O pin is inverting bit0 of IRO Buffer. So, write “1” to bit0 of
the IRO buffer the IRO is output “0” and write “0” to bit0
of the IRO buffer the IRO is output “1”.
O
Output pins with open drain type. P1.4~P1.7 output pin
with NMOS/CMOS selectable.
O Quasi-bi-directional NMOS output pins with pull high.
I Input ports with internal pull high and interrupt function.
Block Diagram
OSCI
OSCO
P2.0 ~ P2.1
IRO
Oscillator
P2
IRO
P0.0 ~ P0.7
P0
Divider
Interrupt
P1.0 ~ P1.7
P1
TM0
P0.7
Watchdog
Timer
CLK
CPU
INT
VDD
GND
/RES
MEGAWIN
MA014B Series Technical Summary
2