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M306V5ME-XXXSP Datasheet(PDF) 70 Page - Mitsubishi Electric Semiconductor

Part No. M306V5ME-XXXSP
Description  SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
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Maker  MITSUBISHI [Mitsubishi Electric Semiconductor]
Homepage  http://www.mitsubishichips.com
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M306V5ME-XXXSP Datasheet(HTML) 70 Page - Mitsubishi Electric Semiconductor

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M306V5ME-XXXSP
M306V5EESP
MITSUBISHI MICROCOMPUTERS
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
70
Rev. 1.0
2.10.1 Timer A
Figure 2.10.3 shows the block diagram of timer A. Figures 2.10.4 to 2.10.10 show the timer A-related
registers.
Except the pulse output function, timers A0 through A4 all have the same function. Use the timer Ai mode
register (i = 0 to 4) bits 0 and 1 to choose the desired mode.
Timer A has the four operation modes listed as follows:
• Timer mode: The timer counts an internal count source.
• Event counter mode: The timer counts a timer over flow.
• One-shot timer mode: The timer stops counting when the count reaches “000016”.
• Pulse width modulation (PWM) mode: The timer outputs pulses of a given width.
Timer Ai mode register
Symbol
Address
When reset
TAiMR(i=0 to 4)
039616 to 039A16
0016
Bit name
Function
Bit symbol
W
R
b7
b6
b5
b4
b3
b2
b1
b0
0 0 : Timer mode
0 1 : Event counter mode
1 0 : One-shot timer mode
1 1 : Pulse width modulation
(PWM) mode
b1 b0
TCK1
MR3
MR2
MR1
TMOD1
MR0
TMOD0
TCK0
Function varies with each operation mode
Count source select bit
(Function varies with each operation mode)
Operation mode select bit
Figure 2.10.3 Block diagram of timer A
Figure 2.10.4 Timer Ai mode register (i = 0 to 4)
Count start flag
(Address 038016)
Up count/down count
TAi
Addresses
TAj
TAk
Timer A0
038716
038616
Timer A4
Timer A1
Timer A1
038916
038816
Timer A0
Timer A2
Timer A2
038B16
038A16
Timer A1
Timer A3
Timer A3
038D16
038C16
Timer A2
Timer A4
Timer A4
038F16
038E16
Timer A3
Timer A0
Always down count except
in event counter mode
Reload register (16)
Counter (16)
Low-order
8 bits
High-order
8 bits
Clock source
selection
• Timer
• One shot
• PWM
f1
f8
f32
External
trigger
TB2 overflow
Clock selection
TAj overflow
(j = i – 1. Note, however, that j = 4 when i = 0)
Pulse output
Toggle flip-flop
TAiOUT
(i = 2, 3)
Data bus low-order bits
Data bus high-order bits
Up/down flag
Down count
(Address 038416)
TAk overflow
(k = i + 1. Note, however, that k = 0 when i = 4)


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