EM78910AAH Ver la hoja de datos (PDF) - ELAN Microelectronics

Número de pieza

componentes Descripción

Fabricante

EM78910AAH

8-BIT MICRO-CONTROLLER

ELAN Microelectronics 

EM78910/910A

8-bit Micro-controller

VII.3 TCC/WDT Prescaler

There is an 8-bit counter available as prescaler for the TCC or WDT. The prescaler is available for the

TCC only or WDT only at the same time.

• An 8-bit counter is available for TCC or WDT determined by the status of the bit 3 (PAB) of the CONT

register.

• See the prescaler ratio in CONT register.

• Fig. 10 depicts the circuit diagram of TCC/WDT.

• Both TCC and prescaler will be cleared by instructions which write to TCC each time.

• The prescaler will be cleared by the WDTC and SLEP instructions, when assigned to WDT mode.

• The prescaler will not be cleared by SLEP instructions, when assigned to TCC mode.

16.38KHz

Fig.10 Block diagram of TCC WDT

VII.4 I/O Ports

The I/O registers, PORT5 ~ PORT7 and PORT9, are bi-directional tri-state I/O ports. PORT7 can be

pulled-high internally by software control. The I/O ports can be defined as "input" or "output" pins by the I/O

control registers (IOC5 ~ IOC7 and IOC9 ) under program control. The I/O registers and I/O control registers are

both readable and writable. The I/O interface circuit is shown in Fig.11.

__________________________________________________________________________________________________________________________________________________________________

* This specification are subject to be changed without notice.

~ 14~

2001/01/12

Share Link: