m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 229

• Manufacturer Part Number: m37905
• Description: Mitsubishi 16-bit Single-chip Microcomputer 7700 Family / 7900 Series
• Manufacturer: Renesas Electronics Corporation.

THREE-PHASE WAVEFORM MODE
10.2 Block description
Fig. 10.2.8 Structure of position-data-retain function control register
10-12
10.2.5 Position-data-retain function control register
Figure 10.2.8 shows the structure of the position-data-retain function control register.
For details of the position-data-retain function, refer to section “10.6 Position-data-retain function.”
(1) W-phase position data retain bit (bit 0)
(2) V-phase position data retain bit (bit 1)
(3) U-phase position data retain bit (bit 2)
(4) Retain-trigger polarity select bit (bit 3)
Position-data-retain function control register (Address AA
Note: This register is valid only in the three-phase mode.
This bit is used to retain the input level at pin IDW.
This bit is used to retain the input level at pin IDV.
This bit is used to retain the input level at pin IDU.
This bit is used to select the trigger polarity to retain the position data.
When this bit = “0,” the falling edge of each positive phase is selected.
When this bit = “1,” the rising edge of each positive phase is selected.
7 to 4
Bit
0
1
2
3
W-phase position data retain bit
V-phase position data retain bit
U-phase position data retain bit
Retain-trigger polarity select bit
Nothing is assigned.
Bit name
7905 Group User’s Manual Rev.1.0
Input level at pin IDV is read out.
0 : “L” level
1 : “H” level
Input level at pin IDU is read out.
0 : “L” level
1 : “H” level
0 : Falling edge of positive phase
1 : Rising edge of positive phase
Input level at pin IDW is read out.
0 : “L” level
1 : “H” level
16
)
Function
b7 b6 b5 b4 b3 b2 b1 b0
At reset
Undefined
0
0
0
0
R/W
RW
RO
RO
RO
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