參數(shù)資料
型號(hào): M30240M4-XXXFP
元件分類(lèi): 微控制器/微處理器
英文描述: 16-BIT, MROM, MICROCONTROLLER, PQFP80
封裝: 0.80 MM PITCH, PLASTIC, QFP-80
文件頁(yè)數(shù): 99/125頁(yè)
文件大?。?/td> 753K
代理商: M30240M4-XXXFP
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Mitsubishi microcomputers
M16C / 24 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
77
CONFIDENTIAL
Preliminary Specifications REV.B
Specifications in this manual are tentative and subject to change
Timer B
2.22 Timer B
Figure 70 shows the block diagram of timer B. Figure 71 and Figure 72 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
works in Timer mode only (i.e., the timer counts an in internal count source).
Figure 70:
Block diagram of Timer B
Figure 71:
Timer B-related registers
Clock source selection
(address 038016)
Reload register (16)
Low-order 8 bits
High-order 8 bits
Data bus low-order bits
Data bus high-order bits
f1
f8
f32
Count start flag
Counter reset circuit
Counter (16)
Address
039116 039016
039316 039216
039516 039416
TBi
Timer B0
Timer B1
Timer B2
TBj
Timer B2
Timer B0
Timer B1
TBj overflow
(j=i - 1. Note, however,
j = 2 when i = 0)
Note 1: Timer B0.
Note 2: Timer B1, timer B2.
Timer Bi mode register
Symbol
Address
When reset
TBiMR(i=0 to 2)
039B16 to 039D16
00XX00002
Bit name
Function
Bit symbol
W
R
b7
b6
b5
b4
b3
b2
b1
b0
Operation mode select bit
0 0 : Timer mode
b1 b0
TMOD1
TMOD0
MR0
Invalid in timer mode
Can be “0” or “1”
MR2
MR1
MR3
0 0 : f1
0 1 : f8
1 0 : f32
1 1 : invalid
TCK1
TCK0
Count source select bit
0
Invalid in timer mode.
This bit can neither be set nor reset. When read in timer mode,
its content is indeterminate.
0
0 (Fixed to “0” in timer mode ; i = 0)
Nothing is assiigned (i = 1, 2).
This bit can neither be set nor reset. When read, its content is indeterminate.
(Note 1)
(Note 2)
b7 b6
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