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APPENDIX
6.7 Control registers
DA n Conversion Register
b7 b6 b5 b4 b3 b2 b1 b0
0
Fig. 6.7.13 DA n conversion register (only M37220M3-XXXSP/FP)
Horizontal Position Register
b7 b6 b5 b4 b3 b2 b1 b0
Fig. 6.7.14 Horizontal position register
6-38
DA n conversion register (DAn) (n = 1 and 2) [Address 00DE
B
Name
0
DA conversion set
bits
to
5
(DAn0–DAn5)
6
Fix this bit to "0."
7
Nothing is assigned. This bit is a write disable bit.
When this bit is read out, the value is " 0."
Horizontal position register (HR) [Address 00E0
B
Name
0
Horizontal display start
to
positions (HR0 to HR5)
5
6, 7
Nothing is assigned. These bits are write disable bits.
When thses bits are read out, the values are "0."
7220 Group User's Manual
Functions
b5
b4
b3
b2
b1
b0
0
0
0
0
0
0
: 0/64Vcc
0
0
0
0
0
1
: 1/64Vcc
0
0
0
0
1
0
: 2/64Vcc
1
1
1
1
0
1
: 61/64Vcc
1
1
1
1
1
0
: 62/64Vcc
1
1
1
1
1
1
: 63/64Vcc
Addresses 00DE
]
16
Functions
After reset R W
64 steps (00
to 3F
)
16
16
, 00DF
]
16
16
After reset
R W
Indeterminate
R W
0
R —
0
R —
, 00DF
16
0
R W
0
R —
Address 00E0
16
16
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