4 a 8-bit 16-bit timer, a peripheral initial, 4-1 the various registers of a 8-bit timer – Panasonic PanaXSeries MN103S65G User Manual

Page 7

Advertising
background image

2-4 A 8-bit 16-bit timer, a peripheral initial

2-4 A 8-bit 16-bit timer, a peripheral initial

2-4-1 The various registers of a 8-bit timer

Book LSI contains eight 8-bit timers, and is an interval timer, an event timer counter, and a clock output. It
can be used as the standard clock of a serial interface, and start timing of A/D conversion.

These timers can perform cascade connection use of a maximum of four.


●Timer register

It is the 8-bit register which counts a timer. A count value can be read by the down counter.

TM0BC,TM1BC,TM3BC,TM4BC,TM5BC,TM6BC,TM7BC

●Timer mode register

It is the 8-bit register which sets up the mode of a timer of operation.
The clock source which can be chosen by each timer is different. Be careful of a setup.

TM0D: Timer 0 mode register
Bit7 : Count operation permission

0: A stop of operation
1: Permission of operation

Bit6 : Base register setup

0: Usually, operation
1: Initialization

The value of a base register is loaded to a binary counter.
The timer pulse output 0 is reset on a low level.

Bit5-3: Prohibition (0 fixation)

Bit2-0: Clock source selection

000:IOCLK
001:IOCLK/8
010:IOCLK/32
011: Prohibition of a setup
100: Prohibition of a setup
101: Timer 1 underflow

2-30

Advertising