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參數(shù)資料
| 型號(hào)： | M37210M3-902SP |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER |
| 中文描述： | 單芯片8位CMOS微機(jī)電壓合成與屏幕顯示控制器 |
| 文件頁數(shù)： | 16/59頁 |
| 文件大小： | 764K |
| 代理商： | M37210M3-902SP |
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MITSUBISHI MICROCOMPUTERS
M37210M3-XXXSP/FP, M37210M4-XXXSP, M37211M2-XXXSP
M37210E4-XXXSP/FP, M37210E4SP/FP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
with ON-SCREEN DISPLAY CONTROLLER
16
within one period in the circuit internal section. Refer to Figure
13 (a).
Six different pulses can be output from the PWM.
These can be selected by bits 0 through 5. Depending on the
content of the 6-bit PWM latch, pulses from 5 to 0 are selected.
The PWM output is the difference of the sum of each of these
pulses. Several examples are shown in Figure 13 (b). Changes
in the contents of the PWM latch allows the selection of 64
lengths of high-level area outputs varying from 0/64 to 63/64. A
length of entirely high-level output cannot be output, i.e. 64/64.
(5) 14-bit PWM Operation
The output example of the 14-bit PWM is shown in Figure 14.
The 14-bit PWM divides the data within the PWM latch into the
lower 6 bits and higher 8 bits.
A high-level area within a length D
H
times
τ
is output every short
area of t = 256
τ
=128
μ
s as determined by data D
H
of the higher
8 bits.
Thus, the time for the high-level area is equal to the time set by
the lower 8 bits or that plus
τ
. As a result, the short-area period
t ( = 128
μ
s, approx. 7.8 kHz) becomes an approximately repeti-
tive period.
(6) Output after Reset
At reset the output of port P6 is in the high impedance state and
the contents of the PWM register and latch are undefined. Note
that after setting the PWM register, its data is transferred to the
latch.
Table 2. Relation between the low-order 6 bits of data and high-level
area increase space
6 low-order bits of data
0 0 0 0 0 0
0 0 0 0 0 1
0 0 0 0 1 0
0 0 0 1 0 0
0 0 1 0 0 0
0 1 0 0 0 0
1 0 0 0 0 0
Area longer by
τ
than that of other t
m
(m = 0 to 63)
Nothing
m = 32
m = 16, 48
m = 8, 24, 40, 56
m = 4, 12, 20, 28, 36, 44, 52, 60
m = 2, 6, 10, 14, 18, 22, 26, 30, 34, 38, 42, 46, 50, 54, 58, 62
m = 1, 3, 5, 7, ................................................... 57, 59, 61, 63
PWM OUTPUT CIRCUIT
(1) Introduction
The M37210M3-XXXSP/FP and M37210M4-XXXSP are
equipped with one 14-bit PWM (DA) and eight 6-bit PWMs
(PWM0-PWM7), and the M37211M2-XXXSP is equipped with
six 6-bit PWMs (PWM0-PWM5). The 14-bit resolution gives DA
the minimum resolution bit width of 500ns (for f(X
IN
)
= 4MHz)
and a repeat period of 8192
μ
s. PWM0-PWM7 have a 6-bit reso-
lution with minimum resolution bit width of 16
m
s and repeat pe-
riod of 1024
μ
s.
Block diagram of the PWM is shown in Figure 16.
The PWM timing generator section applies individual control
signals to DA and PWM0-7 using clock input X
IN
divided by 2
as a reference signal.
(2) Data Setting
The output pins PWM0-3 are in common with port P6 and
PWM4-7 are in common with port P0
0
-P0
3
.
For PWM output, each PWM output selection bit (bit 1 to 7 of
PWM output control register 1, bit 0, 1 of PWM output control
register 2, should be set. When DA is used for output, first set
the higher 8-bit of the DA-H register (address 00CE
16
), then the
lower 6-bit of the DA-L register (address 00CF
16
).
When one of the PWM0-7 is used for output, set the 6-bit in the
PWM0-7 register (address 00D0
16
to 00D4
16
, 00F6
16
to
00F8
16
), respectively.
(3) Transferring Data from Registers to PWM
Circuit
The data written to the PWM registers. 8 bits of the DA-H regis-
ter is transferred to 14-bit PWM circuit when writing to lower 6
bits of the DA-L register.
(4) Operation of the 6-bit PWMs
The timing diagram of the eight 6-bit PWMs (PWM0-7) is shown
in Figure 13. One period (T) is composed of 64 (2
6
) segments.
There are six different pulse types configured from bits 0 to 5
representing the significance of each bit. These are output
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|---|---|
| M37210M3-908SP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER |
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| M37210M3-XXXSP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER |
| M37210M4 | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER |
| M37210M4-218SP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER |
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