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M306V5ME-XXXSP Datasheet(PDF) 80 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) 80 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
80
Rev. 1.0
2.10.2 Timer B
Figure 2.10.17 shows the block diagram of timer B. Figures 2.10.17 and 2.10.20 show the timer B-related
registers.
Use the timer Bi mode register (i = 0 to 2) bits 0 and 1 to choose the desired mode.
Timer B has three operation modes listed as follows:
• Timer mode: The timer counts an internal count source.
• Event counter mode: The timer counts pulses from an external source or a timer overflow.
• Pulse period/pulse width measuring mode: The timer measures an external signal’s pulse period or
pulse width.
Figure 2.10.16 Block diagram of timer B
Figure 2.10.17 Timer Bi mode register (i = 0 to 2)
Timer Bi mode register
Symbol
Address
When reset
TBiMR(i = 0 to 2) 039B16 to 039D16
00?X00002
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 : Pulse period/pulse width
measurement mode
1 1 : Inhibited
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
(Note 1)
(Note 2)
Notes 1: Timer B0.
2: Timer B1, timer B2.
Clock source selection
(address 038016)
• Event counter
• Timer
• Pulse period/pulse width measurement
Reload register (16)
Low-order 8 bits
High-order 8 bits
Data bus low-order bits
Data bus high-order bits
f1
f8
f32
TBj overflow
(j = i – 1.
Note, however,
j = 2 when i = 0)
Can be selected in only
event counter mode
Count start flag
Polarity switching
and edge pulse
TB0IN
Counter reset circuit
Counter (16)
TBi
Address
TBj
Timer B0
039116 039016
Timer B2
Timer B1
039316 039216
Timer B0
Timer B2
039516 039416
Timer B1


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