GMS84512 Datasheet, PDF (6/123 Pages) Hynix Semiconductor – 8-BIT SINGLE CHIP MICROCOMPUTER

GMS 84512 / 84524
1.2 Peripheral Function Overview
BLOCK
Function
INDEX
Prescaler is consists of 10 bits binary counter, and divide oscillation clock.
PRESCALER
/ B.I.T.
The divided output from each bit of prescaler provided to peripheral hardware.
B.I.T a 8 bit binary counter has a function such as security of oscillation
stabilization time, generation of basic interval time interrupt as watch function,
providing the clock for watch-dog timer
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WDT is consist of 6-bit binary counter, WDTR(Watch-Dog Timer Register), and
WATCH-DOG ^{comparator, input clock of WDT is provided by Basic Interval Timer interrupt}
-TIMER
and maximum output cycle is 4 seconds.
When WDTOM is ‘1’, the output of WDT reset the Device.
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Timer is an 8 bit binary counter and consisted of T0, T1, T2, T3.
TIMER /
COUNTER
As an 8-bit binary counter, each T0, T1 can be used 16-bit interval Timer to
connect each other. As an 8 bit binary counter/event counter each T2, T3 can
be used 16-bit/event counter to connect each other.
At 4 MHz oscillation, Maximum interval time of T0 is 8.192 ms, T1 is 2048 ms,
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T0-T1 is about 2 seconds, T2 is 2.048 ms, T3 is 512 uS,T2-T3 is about 0.5
seconds
A/D COMP-
ARATOR
A/D Comparator has 5 bit resolution, and 4 input channel. It has sample and
hold function of input. At 4 MHz it takes about 8 uS to compare. Error is less
than 1/2 LSB.
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SERIAL I/O
It is 8 bit clock synchronous serial interface unit, the clock transmission cycle is
1uS,2uS,4uS Which can be selected external clock. When IOSW(Bit 6 Of
Serial I/O Mode Register) is ‘1’, R33 pin operates Sout at transmission mode,
Sin at receiving mode.
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PWM
( Pulse Width
Modulation )
PWM is consists of 14 bit PWM 1 ch and 7 bit PWM 8 ch.
14 bit PWM has 0.5 uS minimum resolution width, 8192 uS cycle time, 7 bit
PWM has 8uS minimum resolution 8 uS,1024uS, cycle time. The polarity of ^{3 - 32}
PWM output can be assign by Software.
INTERRUPT
INTERVAL
MEASUREM-
Interrupt interval measurement circuit consists of 8 bit binary counter, interrupt
interval saving circuit. It can select 32uS, 64uS as a measurement clock .
Because it can select external signal edge, measurement of input signal cycle
or pulse width is possible. So it can be used Remocon receiving.
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ENT CIRCUIT
Maximum number of character or symbol displayed in CRT is 128 basically
displayed by 22 characters X 3 lines. Maximum 12 lines is possible with OSD
OSD
( On-Screen-
Display )
interrupt.
OSD clock can use 4 MHz ~ 8 MHz size of display character is 16 kinds, it can
be used by line unit. The color of display character is 8 kinds it can be used by
character unit. In display mode, there are character mode, background mode,
color mode, and Blanking mode, it can be used by line unit especially
smoothing function and OSD oscillator control function exists.
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