M306V5ME-XXXSP Datasheet, PDF(74/262 Page) Mitsubishi Electric Semiconductor – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER

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M306V5ME-XXXSP Datasheet, PDF (74/262 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER

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MITSUBISHI MICROCOMPUTERS

M306V5ME-XXXSP

M306V5EESP

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER

and ON-SCREEN DISPLAY CONTROLLER

(1) Timer mode

In this mode, the timer counts an internally generated count source. (See Table 2.10.1.) Figure 2.10.11

shows the timer Ai mode register in timer mode.

Table 2.10.1 Specifications of timer mode

Item

Specification

Count source

f1, f8, f32

Count operation

â¢ Down count

â¢ When the timer underflows, it reloads the reload register contents before continuing counting

Divide ratio

1/(n+1) n : Set value

Count start condition

Count start flag is set (= 1)

Count stop condition

Count start flag is reset (= 0)

Interrupt request generation timing When the timer underflows

TA2OUT/TA3OUT pin function Programmable I/O port or pulse output

Read from timer

Count value can be read out by reading timer Ai register

Write to timer

â¢ When counting stopped

When a value is written to timer Ai register, it is written to both reload register and counter

â¢ When counting in progress

When a value is written to timer Ai register, it is written to only reload register

(Transferred to counter at next reload time)

Select function

â¢ Pulse output function

Each time the timer underflows, the TAiOUT pinâs polarity is reversed

Timer Ai mode register

b7 b6 b5 b4 b3 b2 b1 b0

000 00

Symbol

TAiMR(i=0 to 4)

Address

When reset

039616 to 039A16 0016

Bit symbol

TMOD0

TMOD1

MR0

Bit name

Operation mode

select bit

Pulse output function

select bit

(Note 2)

Function

b1 b0

0 0 : Timer mode

RW

0 : Pulse is not output

(TA2OUT/TA3OUT pin is a normal port pin)

1 : Pulse is output (Note 1)

(TA2OUT/TA3OUT pin is a pulse output pin)

Reserved bits

Must always be set to â0â

MR3

TCK0

TCK1

0 (Must always be set to â0â in timer mode)

Count source select bit

b7 b6

0 0 : f1

0 1 : f8

1 0 : f32

1 1 : Do not set

Notes 1 : The settings of the corresponding port register and port direction register

are invalid.

2 : This bit of TAiMR (i = 0, 1, 4) must always be set to â0.â

Figure 2.10.11 Timer Ai mode register in timer mode (i = 0 to 4)

74

Rev. 1.0

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