SNL320 Просмотр технического описания (PDF) - Sonix Technology Co., Ltd

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производитель

SNL320

16-Bit LCD Controller

Sonix Technology Co., Ltd 

I/O

PAD

Pull-Up

Select

Pull-Up

Resister

In/Out

Control

SNL320

16-Bit LCD Controller

Data Latch

to internal bus

In/Out

Control

I/O Configuration of Port1, Port3 and Port4

Figure-2

In some applications (e.g., Infra Red, IR), an output port needs to be modulated a carry

signal. In the cases, the routine of modulation will occupy too many CPU computations.

Thus, a modulation circuit is built in chip to reduce CPU’s loading.

IREN

P3.2

overflow

Timer2

Figure-3

I/O Pad

The modulation function will be active when the control bit “IREN” set to “1”. And

setting timer2 can generate the frequency of carry signal.

8. TIMER/COUNTER

SNL320 provides three 8-bit timer/event counters (T0/T1/T2). Each timer is 8-bit

binary up-count timer with pre-scalar and auto-reload function. Timer 0 (T0) was

used when voice playing, so user should avoid to use T0.

Ver: 1.2

10

July 22, 2005

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