MB90F474LPF datasheet(58/118 Pages) FUJITSU

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MB90470 Series

10. 16-bit reload timer

The 16-bit reload timer provides a choice of two functions, one is an internal clock countdown synchronized with

any of 3 types of internal clock, and the other is an event count mode that counts down at detection of a given

edge of a pulse input externally. This timer defines an underflow as a transition of the count value from 0000H

to FFFFH. Therefore, an underflow will occur at the count value “reload register setting count

+ 1”. The count

operation includes a choice of reload mode in which the count set value is reloaded at each underflow event,

and one-shot mode in which the count stops at an underflow event. An interrupt can be generated when the

counter reaches an underflow, and the timer is DTC compatible.

(1) Register List

• TMCSR (Timer control status registers)

Timer control status register (high)

Timer control status register (low)

• 16-bit timer register/16-bit reload register

TMR/TMRLR (high)

TMR/TMRLR (low)

0000CBH

Read/write

Default value

0000CAH

Read/write

Default value

0000CDH

Read/write

Default value

0000CCH

Read/write

Default value

(

 )

(

 )

(

 )

(

 )

(

 )

(

 )

(R/W)

( 0 )

(R/W)

( 0 )

(R/W)

( 0 )

(R/W)

( 0 )



(

 )

(

 )





CSL1

CSL0

MOD2

MOD1

(R/W)

( 0 )

(R/W)

( 0 )

(R/W)

( 0 )

(R/W)

( 0 )

(R/W)

( 0 )

(R/W)

( 0 )

(R/W)

( 0 )

OUTE

(R/W)

( 0 )

MOD0

OUTL

RELD

INTE

CNTE

TRG

(R/W)

( X )

(R/W)

( X )

(R/W)

( X )

(R/W)

( X )

(R/W)

( X )

(R/W)

( X )

(R/W)

( X )

D14

(R/W)

( X )

D15

D13

D12

D11

D10

D09

D08

(R/W)

( X )

(R/W)

( X )

(R/W)

( X )

(R/W)

( X )

(R/W)

( X )

(R/W)

( X )

(R/W)

( X )

D06

(R/W)

( X )

D07

D05

D04

D03

D02

D01

D00

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