參數(shù)資料
型號(hào): M37905M8C-XXXSP
元件分類: 微控制器/微處理器
英文描述: 16-BIT, MROM, 20 MHz, MICROCONTROLLER, PDIP64
封裝: 0.750 INCH, 1.78 MM PITCH, PLASTIC, SDIP-64
文件頁數(shù): 72/103頁
文件大?。?/td> 1402K
代理商: M37905M8C-XXXSP
69
M37905M4C-XXXFP, M37905M4C-XXXSP
M37905M6C-XXXFP, M37905M6C-XXXSP
M37905M8C-XXXFP, M37905M8C-XXXSP
PRELIMINAR
Y
Notice:
This
is not
a final
specification.
Som
e param
etric
lim
its are
subject
to change.
16-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
Operation mode
The operation mode is selected by bits 3 and 4 of A-D control regis-
ter 0 and bit 2 of A-D control register 1. The available operation
modes are one-shot, repeat, single sweep, repeat sweep 0, and re-
peat sweap 1. Note that, as for pins AN8 through AN11, only one-shot
and repeat modes can be selected. Either an A-D converter or a
comparator can be selected respectively for each pin in the following
5 modes. The following description applies to the case where the bit
of the comparator function select register 0/1 is “0” and an A-D con-
verter is selected. It also applies to a comparator’s operation except
that an A-D conversion is changed to a comparator operation and
the result of the comparison is stored into the comparator result reg-
ister 0/1.
(1) One-shot mode
One-shot mode is selected when bits 3 and 4 of A-D control register
0 are “0”. The A-D conversion pins are selected with bits 0 to 2 of
A-D control register 0 and bits 0 to 3 of A-D control register 2. A-D
conversion or comparator operation is started when bit 6 of A-D con-
trol register 0 (A-D conversion start bit) is set to “1”.
When the ANi (i = 11 through 0) comparator function select bit of the
comparator function select register 0/1 = “0” and bit 3 of the A-D con-
trol register 1 = “1”, A-D conversion ends 59
φAD cycles after, and the
interrupt request bit of the A-D conversion interrupt control register is
set to “1”. At the same time, bit 6 of the A-D control register 0 (A-D
conversion start bit) is cleared to “0” and this A-D conversion stops.
The result of A-D conversion is stored into the A-D register corre-
sponding to the selected pin.
When the ANi (i = 11 through 0) comparator function select bit of the
comparator function select register 0/1 = “1”, a comparator operation
ends 14
φAD cycles after, and the interrupt request bit of the A-D con-
version interrupt control register is set to “1”. At the same time, bit 6
of the A-D control register 0 (A-D conversion start bit) is cleared to
“0” and the comparator operation stops. The result of the compari-
son is stored into the bits of the comparator result register corre-
sponding to the selected pin.
Fig. 78 Bit configuration of A-D control register 0
A-D control register 0
Address
1E16
76543210
Analog input select bits (Note 1)
(Valid in the one-shot mode and repeat mode.)
0 0 0 : AN0
0 0 1 : AN1
0 1 0 : AN2
0 1 1 : AN3
1 0 0 : AN4
1 0 1 : AN5
1 1 0 : AN6
1 1 1 : AN7 (Note 2)
A-D operation mode select bit 0
0 0 : One-shot mode
0 1 : Repeat mode
1 0 : Single sweep mode
1 1 : Repeat sweep mode 0 or Repeat sweep mode 1
Fix this bit to “0”.
A-D conversion start bit (Note 3)
0 : A-D conversion stopped.
1 : A-D conversion started.
A-D conversion frequency (
φAD) select bit 0
0
Notes 1: Invalid in the single sweep mode and repeat sweep mode 0. (Each of these bits may be “0” or “1”.)
2: When using pin AN7, make sure that the D-A0 output enable bit (bit 0 at address 9616) = “0” (output disabled).
3: Use the MOVM (MOVMB) or STA (STAB or STAD) instruction for rewriting to this bit.
4: Rewriting to each bit of the A-D control register 0 (except for bit 6) must be performed while A-D conversion is stopped.
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