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參數(shù)資料
| 型號： | M37754M8C-XXXGP |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | SINGLE-CHIP 16BIT CMOS MICROCOMPUTER |
| 中文描述： | 單芯片16位微機的CMOS |
| 文件頁數(shù)： | 57/114頁 |
| 文件大?。?/td> | 1116K |
| 代理商： | M37754M8C-XXXGP |
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57
PRELIMINARY
Notice: This is not a final specification.
Some parametric limits are subject to change.
MITSUBISHI MICROCOMPUTERS
M37754M8C-XXXGP, M37754M8C-XXXHP
M37754S4CGP, M37754S4CHP
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Figure 69 shows the comparator function select register (address
64
16
) bit configuration. Bits 7 to 0 correspond to channels 7 to 0 re-
spectively. Each channel can be selected as either an A-D converter
or a comparator. When the bit is “0”, the channel corresponding to it
functions as a 10-bit or an 8-bit A-D converter. When the bit is “1”, the
channel functions as a comparator.
When selecting an A-D converter, an input voltage to a selected ana-
log input pin is A-D converted and the result is stored into the A-D
register.
When selecting a comparator, D-A conversion is performed to the
value of which high-order 8 bits are the value stored in an even ad-
dress of the A-D converter and of which low-order 2 bits are “10
2
.”
Then, this D-A converted value is compared with the voltage sup-
plied to an analog input pin. After the comparison, when the voltage
supplied to an analog input pin is higher, “1” is stored into the com-
parator result register (address 66
16
) shown in Figure 70. When it is
lower, “0” is stored into that register.
Be sure to perform only read to the A-D register of which channel is
selected as an A-D converter, and perform only write to the A-D reg-
ister of which channel is selected as a comparator. Additionally, do
not write to the comparator function select register and the A-D reg-
ister while an A-D converter or a comparator is operating.
Port direction register’s bits corresponding to pins to be A-D con-
verted must be “0” (input mode) because analog input ports are mul-
tiplexed with port P7.
Figure 71 shows the bit configuration of the A-D control register 0
(address 1E
16
) and the A-D control register 1 (address 1F
16
).
An operation clock (
φ
AD
) of an A-D converter or a comparator can be
selected with bit 7 of the A-D control register 0 and bit 4 of the A-D
control register 1.
When bit 4 (frequency select flag 1) of the A-D control register 1 is
“0”,
φ
AD
becomes Pf
8
when bit 7 (frequency select flag 0) of the A-D
control register 0 is “0”,
φ
AD
becomes Pf
4
when bit 7 of the A-D con-
trol register 0 is “1”.
When the frequency select flag 1 is “1”,
φ
AD
becomes Pf
2
when the
frequency select flag 0 is “0”,
φ
AD
becomes
φ
1
when the frequency
select flag 0 is “1”. The last case is used when
φ
1
is forcibly used as
φ
AD
in high-speed running (f(X
IN
) >
φ
1
> 12.5 MHz). However, this se-
lection is available only in 8-bit resolution mode.
φ
AD
during A-D conversion must be 250 kHz or more because the
comparator uses a capacity coupling amplifier.
Bit 3 of A-D control register 1 is used to select whether to regard the
conversion result as 10-bit or as 8-bit data. The conversion result is
regarded as 10-bit data when bit 3 is “1” and as 8-bit data when bit 3
is “0”.
When the conversion result is used as 10-bit data, the low-order 8
bits of the conversion result is stored in the even address of the cor-
responding A-D register and the high-order 2 bits are stored in bits 0
and 1 at the odd address of the corresponding A-D register. Bits 2 to
7 of the A-D register odd address are “000000
2
” when read.
When the conversion result is used as 8-bit data, the high-order 8
bits of the 10-bit A-D conversion result are stored in even address of
the corresponding A-D register. In this case, the value at the A-D
register’s odd address is “00
16
” when read.
Whether to connect the reference voltage input (V
REF
) with the lad-
Fig. 69 Comparator function select register bit configuration
Fig. 70 Comparator result register bit configuration
der network or not depends on bit 5 of the A-D control register 1. The
V
REF
pin is connected when bit 5 is “0” and is disconnected when bit
5 is “1” (High impedance state).
When A-D or D-A conversion is not performed, current from the V
REF
pin to the ladder network can be cut off by disconnecting ladder net-
work from the V
REF
pin.
Before starting A-D or D-A conversion, wait for 1
μ
s or more after
clearing bit 5 to “0”.
Note:
Do not access with the SEB or CLB instruction.
7
6
5
4
3
2
1
0
Comparator function select register
“0” : Select A-D converter
“1” : Select comparator
AN
0
pin comparator function select bit
AN
1
pin comparator function select bit
AN
2
pin comparator function select bit
AN
3
pin comparator function select bit
AN
4
pin comparator function select bit
AN
5
pin comparator function select bit
AN
6
pin comparator function select bit
AN
7
pin comparator function select bit
Address
64
16
7
6
5
4
3
2
1
0
Comparator result register
“0” : ANi input level is lower than set digital value
“1” : ANi input level is higher than set digital value
AN
0
pin comparator result bit
AN
1
pin comparator result bit
AN
2
pin comparator result bit
AN
3
pin comparator result bit
AN
4
pin comparator result bit
AN
5
pin comparator result bit
AN
6
pin comparator result bit
AN
7
pin comparator result bit
Address
66
16
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| M37754M8C-XXXHP | SINGLE-CHIP 16BIT CMOS MICROCOMPUTER |
| M37754S4CGP | SINGLE-CHIP 16BIT CMOS MICROCOMPUTER |
| M37754S4CHP | SINGLE-CHIP 16BIT CMOS MICROCOMPUTER |
| M37754 | SINGLE-CHIP 16BIT CMOS MICROCOMPUTER |
| M37754M8C | Single Chip 16 Bits CMOS Microcomputer(16位單片機) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M37754M8C-XXXHP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16BIT CMOS MICROCOMPUTER |
| M37754S4CGP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16BIT CMOS MICROCOMPUTER |
| M37754S4CHP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M3775PR-H400CL | 制造商:Bonitron 功能描述:OVERVOLTAGE BRAKING RESISTOR |
| M3775RK-0.75A | 制造商:Bonitron 功能描述:OVERVOLTAGE BRAKING RESISTOR |
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